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PYSEC-2023-24
Vulnerability from pysec - Published: 2023-02-23 00:15 - Updated: 2023-05-04 03:49
VLAI
Details
Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.
Impacted products
| Name | purl | markdown-it-py | pkg:pypi/markdown-it-py |
|---|
Aliases
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "markdown-it-py",
"purl": "pkg:pypi/markdown-it-py"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "ae03c6107dfa18e648f6fdd1280f5b89092d5d49"
}
],
"repo": "https://github.com/executablebooks/markdown-it-py",
"type": "GIT"
},
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.2.0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.1.0",
"0.1.1",
"0.2.0",
"0.2.1",
"0.2.2",
"0.2.3",
"0.3.0",
"0.3.1",
"0.3.2",
"0.3.3",
"0.4.0",
"0.4.1",
"0.4.2",
"0.4.3",
"0.4.4",
"0.4.5",
"0.4.6",
"0.4.7",
"0.4.8",
"0.4.9",
"0.5.0",
"0.5.1",
"0.5.2",
"0.5.3",
"0.5.4",
"0.5.5",
"0.5.6",
"0.5.7",
"0.5.8",
"0.6.0",
"0.6.1",
"0.6.2",
"1.0.0",
"1.0.0b1",
"1.0.0b2",
"1.0.0b3",
"1.1.0",
"2.0.0",
"2.0.1",
"2.1.0"
]
}
],
"aliases": [
"CVE-2023-26303",
"GHSA-vrjv-mxr7-vjf8"
],
"details": "Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.",
"id": "PYSEC-2023-24",
"modified": "2023-05-04T03:49:46.302314Z",
"published": "2023-02-23T00:15:00Z",
"references": [
{
"type": "FIX",
"url": "https://github.com/executablebooks/markdown-it-py/commit/ae03c6107dfa18e648f6fdd1280f5b89092d5d49"
},
{
"type": "ADVISORY",
"url": "https://github.com/advisories/GHSA-vrjv-mxr7-vjf8"
}
]
}
BREW-LOCALSTACK-CVE-2023-26303 (GHSA-VRJV-MXR7-VJF8)
Vulnerability from osv_homebrew – Published: 2026-08-13 17:03 – Updated: 2026-10-08 01:11 – Source website
VLAI
Summary
markdown-it-py Denial of Service vulnerability
Details
Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.
Severity
References
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "markdown-it-py",
"resource_purl": "pkg:pypi/markdown-it-py@4.0.0",
"upstream_fixed_in": "2.2.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "localstack",
"purl": "pkg:brew/localstack"
},
"ranges": [
{
"events": [
{
"introduced": "1.3.1"
},
{
"fixed": "2.0.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/markdown-it-py@4.0.0",
"name": "markdown-it-py",
"resource": "markdown-it-py",
"strategy": "registry",
"subject_version": "4.0.0"
}
]
},
"details": "Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.",
"id": "BREW-localstack-CVE-2023-26303",
"modified": "2026-10-08T01:11:17Z",
"published": "2026-08-13T17:03:02Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-26303"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/pull/246"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/commit/53ca3e9c2b9e9b295f6abf7f4ad2730a9b70f68c"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/commit/ae03c6107dfa18e648f6fdd1280f5b89092d5d49"
},
{
"type": "PACKAGE",
"url": "https://github.com/executablebooks/markdown-it-py"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/markdown-it-py/PYSEC-2023-24.yaml"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "markdown-it-py Denial of Service vulnerability",
"upstream": [
"GHSA-vrjv-mxr7-vjf8",
"CVE-2023-26303",
"PYSEC-2023-24"
]
}
BREW-PDM-CVE-2023-26303 (GHSA-VRJV-MXR7-VJF8)
Vulnerability from osv_homebrew – Published: 2026-08-13 17:25 – Updated: 2026-09-17 18:33 – Source website
VLAI
Summary
markdown-it-py Denial of Service vulnerability
Details
Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.
Severity
References
| URL | Type | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "markdown-it-py",
"resource_purl": "pkg:pypi/markdown-it-py@4.2.0",
"upstream_fixed_in": "2.2.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "pdm",
"purl": "pkg:brew/pdm"
},
"ranges": [
{
"events": [
{
"introduced": "2.4.1"
},
{
"fixed": "2.4.7"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/markdown-it-py@4.2.0",
"name": "markdown-it-py",
"resource": "markdown-it-py",
"strategy": "registry",
"subject_version": "4.2.0"
}
]
},
"details": "Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.",
"id": "BREW-pdm-CVE-2023-26303",
"modified": "2026-09-17T18:33:10Z",
"published": "2026-08-13T17:25:44Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-26303"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/pull/246"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/commit/53ca3e9c2b9e9b295f6abf7f4ad2730a9b70f68c"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/commit/ae03c6107dfa18e648f6fdd1280f5b89092d5d49"
},
{
"type": "PACKAGE",
"url": "https://github.com/executablebooks/markdown-it-py"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/markdown-it-py/PYSEC-2023-24.yaml"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "markdown-it-py Denial of Service vulnerability",
"upstream": [
"GHSA-vrjv-mxr7-vjf8",
"CVE-2023-26303",
"PYSEC-2023-24"
]
}
BREW-PFERD-CVE-2023-26303 (GHSA-VRJV-MXR7-VJF8)
Vulnerability from osv_homebrew – Published: 2026-08-13 17:26 – Updated: 2026-10-08 01:09 – Source website
VLAI
Summary
markdown-it-py Denial of Service vulnerability
Details
Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.
Severity
References
| URL | Type | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "markdown-it-py",
"resource_purl": "pkg:pypi/markdown-it-py@4.2.0",
"upstream_fixed_in": "2.2.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "pferd",
"purl": "pkg:brew/pferd"
},
"ranges": [
{
"events": [
{
"introduced": "3.4.3"
},
{
"fixed": "3.4.3_1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/markdown-it-py@4.2.0",
"name": "markdown-it-py",
"resource": "markdown-it-py",
"strategy": "registry",
"subject_version": "4.2.0"
}
]
},
"details": "Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.",
"id": "BREW-pferd-CVE-2023-26303",
"modified": "2026-10-08T01:09:49Z",
"published": "2026-08-13T17:26:03Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-26303"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/pull/246"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/commit/53ca3e9c2b9e9b295f6abf7f4ad2730a9b70f68c"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/commit/ae03c6107dfa18e648f6fdd1280f5b89092d5d49"
},
{
"type": "PACKAGE",
"url": "https://github.com/executablebooks/markdown-it-py"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/markdown-it-py/PYSEC-2023-24.yaml"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "markdown-it-py Denial of Service vulnerability",
"upstream": [
"GHSA-vrjv-mxr7-vjf8",
"CVE-2023-26303",
"PYSEC-2023-24"
]
}
BREW-PIP-AUDIT-CVE-2023-26303 (GHSA-VRJV-MXR7-VJF8)
Vulnerability from osv_homebrew – Published: 2026-08-13 17:28 – Updated: 2026-09-17 19:10 – Source website
VLAI
Summary
markdown-it-py Denial of Service vulnerability
Details
Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.
Severity
References
| URL | Type | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "markdown-it-py",
"resource_purl": "pkg:pypi/markdown-it-py@4.2.0",
"upstream_fixed_in": "2.2.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "pip-audit",
"purl": "pkg:brew/pip-audit"
},
"ranges": [
{
"events": [
{
"introduced": "2.4.14"
},
{
"fixed": "2.5.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/markdown-it-py@4.2.0",
"name": "markdown-it-py",
"resource": "markdown-it-py",
"strategy": "registry",
"subject_version": "4.2.0"
}
]
},
"details": "Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.",
"id": "BREW-pip-audit-CVE-2023-26303",
"modified": "2026-09-17T19:10:51Z",
"published": "2026-08-13T17:28:21Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-26303"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/pull/246"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/commit/53ca3e9c2b9e9b295f6abf7f4ad2730a9b70f68c"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/commit/ae03c6107dfa18e648f6fdd1280f5b89092d5d49"
},
{
"type": "PACKAGE",
"url": "https://github.com/executablebooks/markdown-it-py"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/markdown-it-py/PYSEC-2023-24.yaml"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "markdown-it-py Denial of Service vulnerability",
"upstream": [
"GHSA-vrjv-mxr7-vjf8",
"CVE-2023-26303",
"PYSEC-2023-24"
]
}
BREW-S3QL-CVE-2023-26303 (GHSA-VRJV-MXR7-VJF8)
Vulnerability from osv_homebrew – Published: 2026-08-13 17:33 – Updated: 2026-09-10 01:10 – Source website
VLAI
Summary
markdown-it-py Denial of Service vulnerability
Details
Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.
Severity
References
| URL | Type | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "markdown-it-py",
"resource_purl": "pkg:pypi/markdown-it-py@4.2.0",
"upstream_fixed_in": "2.2.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "s3ql",
"purl": "pkg:brew/s3ql"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "6.3.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/markdown-it-py@4.2.0",
"name": "markdown-it-py",
"resource": "markdown-it-py",
"strategy": "registry",
"subject_version": "4.2.0"
}
]
},
"details": "Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.",
"id": "BREW-s3ql-CVE-2023-26303",
"modified": "2026-09-10T01:10:54Z",
"published": "2026-08-13T17:33:32Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-26303"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/pull/246"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/commit/53ca3e9c2b9e9b295f6abf7f4ad2730a9b70f68c"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/commit/ae03c6107dfa18e648f6fdd1280f5b89092d5d49"
},
{
"type": "PACKAGE",
"url": "https://github.com/executablebooks/markdown-it-py"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/markdown-it-py/PYSEC-2023-24.yaml"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "markdown-it-py Denial of Service vulnerability",
"upstream": [
"GHSA-vrjv-mxr7-vjf8",
"CVE-2023-26303",
"PYSEC-2023-24"
]
}
BREW-SEMGREP-CVE-2023-26303 (GHSA-VRJV-MXR7-VJF8)
Vulnerability from osv_homebrew – Published: 2026-08-13 17:34 – Updated: 2026-09-17 18:23 – Source website
VLAI
Summary
markdown-it-py Denial of Service vulnerability
Details
Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.
Severity
References
| URL | Type | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "markdown-it-py",
"resource_purl": "pkg:pypi/markdown-it-py@4.2.0",
"upstream_fixed_in": "2.2.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "semgrep",
"purl": "pkg:brew/semgrep"
},
"ranges": [
{
"events": [
{
"introduced": "1.10.0"
},
{
"fixed": "1.13.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/markdown-it-py@4.2.0",
"name": "markdown-it-py",
"resource": "markdown-it-py",
"strategy": "registry",
"subject_version": "4.2.0"
}
]
},
"details": "Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.",
"id": "BREW-semgrep-CVE-2023-26303",
"modified": "2026-09-17T18:23:29Z",
"published": "2026-08-13T17:34:27Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-26303"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/pull/246"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/commit/53ca3e9c2b9e9b295f6abf7f4ad2730a9b70f68c"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/commit/ae03c6107dfa18e648f6fdd1280f5b89092d5d49"
},
{
"type": "PACKAGE",
"url": "https://github.com/executablebooks/markdown-it-py"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/markdown-it-py/PYSEC-2023-24.yaml"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "markdown-it-py Denial of Service vulnerability",
"upstream": [
"GHSA-vrjv-mxr7-vjf8",
"CVE-2023-26303",
"PYSEC-2023-24"
]
}
BREW-THEHARVESTER-CVE-20… (GHSA-VRJV-MXR7-VJF8)
Vulnerability from osv_homebrew – Published: 2026-08-13 17:43 – Updated: 2026-09-10 01:28 – Source website
VLAI
Summary
markdown-it-py Denial of Service vulnerability
Details
Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.
Severity
References
| URL | Type | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "markdown-it-py",
"resource_purl": "pkg:pypi/markdown-it-py@4.2.0",
"upstream_fixed_in": "2.2.0"
},
"package": {
"ecosystem": "Homebrew",
"name": "theharvester",
"purl": "pkg:brew/theharvester"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "4.11.1_1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/markdown-it-py@4.2.0",
"name": "markdown-it-py",
"resource": "markdown-it-py",
"strategy": "registry",
"subject_version": "4.2.0"
}
]
},
"details": "Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.",
"id": "BREW-theharvester-CVE-2023-26303",
"modified": "2026-09-10T01:28:32Z",
"published": "2026-08-13T17:43:26Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-26303"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/pull/246"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/commit/53ca3e9c2b9e9b295f6abf7f4ad2730a9b70f68c"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/commit/ae03c6107dfa18e648f6fdd1280f5b89092d5d49"
},
{
"type": "PACKAGE",
"url": "https://github.com/executablebooks/markdown-it-py"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/markdown-it-py/PYSEC-2023-24.yaml"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "markdown-it-py Denial of Service vulnerability",
"upstream": [
"GHSA-vrjv-mxr7-vjf8",
"CVE-2023-26303",
"PYSEC-2023-24"
]
}
CVE-2023-26303 (GCVE-0-2023-26303)
Vulnerability from cvelistv5 – Published: 2023-02-22 23:44 – Updated: 2025-03-11 18:22
VLAI
EPSS
VEX
Title
markdown-it-py crash on null assertions
Summary
Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-03-11 18:22 UTC
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/executablebooks/markdown-it-py… | patch |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Executable Books | markdown-it-py |
Affected:
0 , < v2.2.0
(semver)
|
Date Public
2023-02-22 04:56
Credits
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-02T11:46:24.274Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"patch",
"x_transferred"
],
"url": "https://github.com/executablebooks/markdown-it-py/commit/ae03c6107dfa18e648f6fdd1280f5b89092d5d49"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2023-26303",
"options": [
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"Exploitation": "none"
},
{
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},
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}
],
"role": "CISA Coordinator",
"timestamp": "2025-03-11T18:22:03.295337Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
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"cweId": "CWE-173",
"description": "CWE-173 Improper Handling of Alternate Encoding",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-03-11T18:22:36.539Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"collectionURL": "https://github.com/executablebooks/markdown-it-py/releases",
"defaultStatus": "unaffected",
"packageName": "markdown-it-py",
"platforms": [
"Linux",
"MacOS",
"Windows"
],
"product": "markdown-it-py",
"repo": "https://github.com/executablebooks/markdown-it-py",
"vendor": "Executable Books",
"versions": [
{
"changes": [
{
"at": "commit ae03c61",
"status": "unaffected"
}
],
"lessThan": "v2.2.0",
"status": "affected",
"version": "0",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Mark Esler"
},
{
"lang": "en",
"type": "remediation developer",
"value": "Chris Sewell"
}
],
"datePublic": "2023-02-22T04:56:39.000Z",
"descriptions": [
{
"lang": "en",
"value": "Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input."
}
],
"impacts": [
{
"capecId": "CAPEC-267",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-267"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "LOW",
"baseScore": 3.3,
"baseSeverity": "LOW",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
"version": "3.1"
},
"format": "CVSS"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-173",
"description": "CWE-173",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2023-02-22T23:44:40.711Z",
"orgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
"shortName": "canonical"
},
"references": [
{
"tags": [
"patch"
],
"url": "https://github.com/executablebooks/markdown-it-py/commit/ae03c6107dfa18e648f6fdd1280f5b89092d5d49"
}
],
"timeline": [
{
"lang": "en",
"time": "2023-02-07T20:19:00.000Z",
"value": "Reported to upstream."
},
{
"lang": "en",
"time": "2023-02-22T04:56:39.000Z",
"value": "Patched by upstream."
}
],
"title": "markdown-it-py crash on null assertions"
}
},
"cveMetadata": {
"assignerOrgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
"assignerShortName": "canonical",
"cveId": "CVE-2023-26303",
"datePublished": "2023-02-22T23:44:40.711Z",
"dateReserved": "2023-02-21T22:36:47.685Z",
"dateUpdated": "2025-03-11T18:22:36.539Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
GHSA-VRJV-MXR7-VJF8
Vulnerability from github – Published: 2023-02-23 00:30 – Updated: 2024-09-30 20:22
VLAI
Summary
markdown-it-py Denial of Service vulnerability
Details
Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.
Severity
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "markdown-it-py"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.2.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2023-26303"
],
"database_specific": {
"cwe_ids": [
"CWE-173"
],
"github_reviewed": true,
"github_reviewed_at": "2023-02-23T19:40:55Z",
"nvd_published_at": "2023-02-23T00:15:00Z",
"severity": "HIGH"
},
"details": "Denial of service could be caused to markdown-it-py, before v2.2.0, if an attacker was allowed to force null assertions with specially crafted input.",
"id": "GHSA-vrjv-mxr7-vjf8",
"modified": "2024-09-30T20:22:35Z",
"published": "2023-02-23T00:30:39Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-26303"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/pull/246"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/commit/53ca3e9c2b9e9b295f6abf7f4ad2730a9b70f68c"
},
{
"type": "WEB",
"url": "https://github.com/executablebooks/markdown-it-py/commit/ae03c6107dfa18e648f6fdd1280f5b89092d5d49"
},
{
"type": "PACKAGE",
"url": "https://github.com/executablebooks/markdown-it-py"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/markdown-it-py/PYSEC-2023-24.yaml"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "markdown-it-py Denial of Service vulnerability"
}
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Trend slope:
-
(linear fit over daily sighting counts)
Show additional events:
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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