CVE-2026-23738 (GCVE-0-2026-23738)
Vulnerability from cvelistv5 – Published: 2026-02-06 16:41 – Updated: 2026-02-06 17:44
VLAI
EPSS
VEX
Title
The Asterisk embedded web server 's /httpstatus page echos user supplied values(cookie and query string) without sanitization
Summary
Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2, user supplied/control values for Cookies and any GET variable query Parameter are directly interpolated into the HTML of the page using ast_str_append. The endpoint at GET /httpstatus is the potential vulnerable endpoint relating to asterisk/main /http.c. This issue has been patched in versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-02-06 17:43 UTC
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/asterisk/asterisk/security/adv… | x_refsource_CONFIRM |
Impacted products
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-23738",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-02-06T17:43:40.418371Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-02-06T17:44:20.480Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "asterisk",
"vendor": "asterisk",
"versions": [
{
"status": "affected",
"version": "\u003c 23.2.2"
},
{
"status": "affected",
"version": "\u003c 22.8.2"
},
{
"status": "affected",
"version": "\u003c 21.12.1"
},
{
"status": "affected",
"version": "\u003c 20.18.2"
},
{
"status": "affected",
"version": "\u003c 20.7-cert9"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2, user supplied/control values for Cookies and any GET variable query Parameter are directly interpolated into the HTML of the page using ast_str_append. The endpoint at GET /httpstatus is the potential vulnerable endpoint relating to asterisk/main /http.c. This issue has been patched in versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "ADJACENT_NETWORK",
"availabilityImpact": "NONE",
"baseScore": 3.5,
"baseSeverity": "LOW",
"confidentialityImpact": "LOW",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-79",
"description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-02-06T16:41:43.769Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/asterisk/asterisk/security/advisories/GHSA-v6hp-wh3r-cwxh",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/asterisk/asterisk/security/advisories/GHSA-v6hp-wh3r-cwxh"
}
],
"source": {
"advisory": "GHSA-v6hp-wh3r-cwxh",
"discovery": "UNKNOWN"
},
"title": "The Asterisk embedded web server \u0027s /httpstatus page echos user supplied values(cookie and query string) without sanitization"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-23738",
"datePublished": "2026-02-06T16:41:43.769Z",
"dateReserved": "2026-01-15T15:45:01.957Z",
"dateUpdated": "2026-02-06T17:44:20.480Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-23738",
"date": "2026-10-02",
"epss": "0.00167",
"percentile": "0.05364"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"product": "asterisk",
"vendor": "asterisk",
"versions": [
{
"status": "affected",
"version": "\u003c 23.2.2"
},
{
"status": "affected",
"version": "\u003c 22.8.2"
},
{
"status": "affected",
"version": "\u003c 21.12.1"
},
{
"status": "affected",
"version": "\u003c 20.18.2"
},
{
"status": "affected",
"version": "\u003c 20.7-cert9"
}
]
}
],
"source": "security-advisories@github.com"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:*",
"matchCriteriaId": "55FE60C1-D6E7-40DE-A1E3-C37A8ED13BAA",
"versionEndIncluding": "20.18.2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:*",
"matchCriteriaId": "842D5FCD-E7A1-45AF-BC46-7C6CB03AE88E",
"versionEndIncluding": "21.12.1",
"versionStartIncluding": "21.0.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:*",
"matchCriteriaId": "F12BA0F4-535F-409E-B2AB-84B703707055",
"versionEndIncluding": "22.8.2",
"versionStartIncluding": "22.0.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:*",
"matchCriteriaId": "B036D768-9ADA-4965-A596-BEF60749C3CD",
"versionEndExcluding": "23.2.2",
"versionStartIncluding": "23.0.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:sangoma:certified_asterisk:*:*:*:*:*:*:*:*",
"matchCriteriaId": "44460225-C50D-414A-A2E0-F8280E1C1E1D",
"versionEndIncluding": "18.9",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:sangoma:certified_asterisk:20.7:cert1:*:*:*:*:*:*",
"matchCriteriaId": "79225576-AF7C-4099-9624-C53578A7417F",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:sangoma:certified_asterisk:20.7:cert1-rc1:*:*:*:*:*:*",
"matchCriteriaId": "29323E6E-12C9-46C7-B29C-25E0CD537A8E",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:sangoma:certified_asterisk:20.7:cert1-rc2:*:*:*:*:*:*",
"matchCriteriaId": "8E563972-78C0-40A0-83EA-6A3BA3D71946",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:sangoma:certified_asterisk:20.7:cert2:*:*:*:*:*:*",
"matchCriteriaId": "64209621-D458-432A-B0E3-C8D0B6698574",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:sangoma:certified_asterisk:20.7:cert3:*:*:*:*:*:*",
"matchCriteriaId": "B148158A-8354-41C2-A44C-2C0DAABAD217",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:sangoma:certified_asterisk:20.7:cert4:*:*:*:*:*:*",
"matchCriteriaId": "3D4D96E8-1F01-42B8-9181-67DEB12D9DD2",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:sangoma:certified_asterisk:20.7:cert5:*:*:*:*:*:*",
"matchCriteriaId": "50D1B02A-F5F9-48EB-A396-412821F5D602",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:sangoma:certified_asterisk:20.7:cert6:*:*:*:*:*:*",
"matchCriteriaId": "4CBB2891-448F-4C4E-8A47-2283A8F71FE6",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:sangoma:certified_asterisk:20.7:cert7:*:*:*:*:*:*",
"matchCriteriaId": "A9AF30E9-FC50-4A5C-BC99-9B3394488B9D",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:sangoma:certified_asterisk:20.7:cert8:*:*:*:*:*:*",
"matchCriteriaId": "1A41366F-EA16-4867-A198-ACFFE5AFEA9A",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2, user supplied/control values for Cookies and any GET variable query Parameter are directly interpolated into the HTML of the page using ast_str_append. The endpoint at GET /httpstatus is the potential vulnerable endpoint relating to asterisk/main /http.c. This issue has been patched in versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2."
},
{
"lang": "es",
"value": "Asterisk es una centralita privada y un kit de herramientas de telefon\u00eda de c\u00f3digo abierto. Antes de las versiones 20.7-cert9, 20.18.2, 21.12.1, 22.8.2 y 23.2.2, los valores proporcionados/controlados por el usuario para las Cookies y cualquier par\u00e1metro de consulta de variable GET se interpolan directamente en el HTML de la p\u00e1gina usando ast_str_append. El endpoint en GET /httpstatus es el endpoint potencialmente vulnerable relacionado con asterisk/main /http.c. Este problema ha sido parcheado en las versiones 20.7-cert9, 20.18.2, 21.12.1, 22.8.2 y 23.2.2."
}
],
"id": "CVE-2026-23738",
"lastModified": "2026-06-17T10:22:01.440",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "ADJACENT_NETWORK",
"availabilityImpact": "NONE",
"baseScore": 3.5,
"baseSeverity": "LOW",
"confidentialityImpact": "LOW",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N",
"version": "3.1"
},
"exploitabilityScore": 2.1,
"impactScore": 1.4,
"source": "security-advisories@github.com",
"type": "Secondary"
},
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.1,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
"version": "3.1"
},
"exploitabilityScore": 2.8,
"impactScore": 2.7,
"source": "nvd@nist.gov",
"type": "Primary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-23738",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-02-06T17:43:40.418371Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-02-06T17:16:26.000",
"references": [
{
"source": "security-advisories@github.com",
"tags": [
"Vendor Advisory"
],
"url": "https://github.com/asterisk/asterisk/security/advisories/GHSA-v6hp-wh3r-cwxh"
}
],
"sourceIdentifier": "security-advisories@github.com",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-79"
}
],
"source": "security-advisories@github.com",
"type": "Secondary"
}
]
}
},
"redhat_vex": {
"current_release_date": "2026-06-28T07:21:16+00:00",
"cve": "CVE-2026-23738",
"id": "CVE-2026-23738",
"initial_release_date": "2026-02-06T16:41:43.769000+00:00",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "asterisk: embedded /httpstatus page echos user supplied values without sanitization",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23738.json",
"version": "3"
},
"vulnrichment": {
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-23738",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-02-06T17:43:40.418371Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-02-06T17:44:13.843Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "asterisk",
"vendor": "asterisk",
"versions": [
{
"status": "affected",
"version": "\u003c 23.2.2"
},
{
"status": "affected",
"version": "\u003c 22.8.2"
},
{
"status": "affected",
"version": "\u003c 21.12.1"
},
{
"status": "affected",
"version": "\u003c 20.18.2"
},
{
"status": "affected",
"version": "\u003c 20.7-cert9"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2, user supplied/control values for Cookies and any GET variable query Parameter are directly interpolated into the HTML of the page using ast_str_append. The endpoint at GET /httpstatus is the potential vulnerable endpoint relating to asterisk/main /http.c. This issue has been patched in versions 20.7-cert9, 20.18.2, 21.12.1, 22.8.2, and 23.2.2."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "ADJACENT_NETWORK",
"availabilityImpact": "NONE",
"baseScore": 3.5,
"baseSeverity": "LOW",
"confidentialityImpact": "LOW",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-79",
"description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-02-06T16:41:43.769Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/asterisk/asterisk/security/advisories/GHSA-v6hp-wh3r-cwxh",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/asterisk/asterisk/security/advisories/GHSA-v6hp-wh3r-cwxh"
}
],
"source": {
"advisory": "GHSA-v6hp-wh3r-cwxh",
"discovery": "UNKNOWN"
},
"title": "The Asterisk embedded web server \u0027s /httpstatus page echos user supplied values(cookie and query string) without sanitization"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-23738",
"datePublished": "2026-02-06T16:41:43.769Z",
"dateReserved": "2026-01-15T15:45:01.957Z",
"dateUpdated": "2026-02-06T17:44:20.480Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
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.
Loading…
Loading…
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.
Loading…
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.
Loading…