CVE-2026-23935 (GCVE-0-2026-23935)
Vulnerability from cvelistv5 – Published: 2026-08-18 12:19 – Updated: 2026-08-18 13:34
VLAI
EPSS
VEX
Title
Use-after-free read in script item/preprocessing HttpRequest body
Summary
A Zabbix administrator is able to read out of bounds memory by utilizing a flaw in script item/preprocessing (JavaScript) HttpRequest logic, leading to potential confidentiality loss.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 12:50 UTC
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
1 reference
Impacted products
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-23935",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-18T12:50:59.903092Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-08-18T13:34:59.670Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unknown",
"modules": [
"Server"
],
"product": "Zabbix",
"repo": "https://git.zabbix.com/",
"vendor": "Zabbix",
"versions": [
{
"changes": [
{
"at": "7.0.28",
"status": "unaffected"
}
],
"lessThanOrEqual": "7.0.27",
"status": "affected",
"version": "7.0.0",
"versionType": "git"
},
{
"changes": [
{
"at": "7.4.12",
"status": "unaffected"
}
],
"lessThanOrEqual": "7.4.11",
"status": "affected",
"version": "7.4.0",
"versionType": "git"
}
]
}
],
"configurations": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eAn authenticated administrator using specifically crafted script item or JavaScript preprocessing scripts.\u003c/p\u003e"
}
],
"value": "An authenticated administrator using specifically crafted script item or JavaScript preprocessing scripts."
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "Zabbix wants to thank Aikido Security for submitting this report on the HackerOne bug bounty platform."
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eA Zabbix administrator is able to read out of bounds memory by utilizing a flaw in script item/preprocessing (JavaScript) HttpRequest logic, leading to potential confidentiality loss.\u003c/p\u003e"
}
],
"value": "A Zabbix administrator is able to read out of bounds memory by utilizing a flaw in script item/preprocessing (JavaScript) HttpRequest logic, leading to potential confidentiality loss."
}
],
"impacts": [
{
"capecId": "CAPEC-540",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-540: Overread Buffers"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "ADJACENT",
"baseScore": 6.8,
"baseSeverity": "MEDIUM",
"exploitMaturity": "NOT_DEFINED",
"privilegesRequired": "HIGH",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-125",
"description": "CWE-125: Out-of-bounds Read",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-18T12:19:38.955Z",
"orgId": "72de3e22-0555-4a0d-ae81-9249e0f0a1e8",
"shortName": "Zabbix"
},
"references": [
{
"url": "https://support.zabbix.com/browse/ZBX-28073"
}
],
"solutions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eUpdate the affected components to their respective fixed versions.\u003c/p\u003e"
}
],
"value": "Update the affected components to their respective fixed versions."
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "Use-after-free read in script item/preprocessing HttpRequest body",
"x_generator": {
"engine": "Vulnogram 1.0.4"
}
}
},
"cveMetadata": {
"assignerOrgId": "72de3e22-0555-4a0d-ae81-9249e0f0a1e8",
"assignerShortName": "Zabbix",
"cveId": "CVE-2026-23935",
"datePublished": "2026-08-18T12:19:38.955Z",
"dateReserved": "2026-01-19T14:03:13.686Z",
"dateUpdated": "2026-08-18T13:34:59.670Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-23935",
"date": "2026-10-02",
"epss": "0.00337",
"percentile": "0.2478"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unknown",
"modules": [
"Server"
],
"product": "Zabbix",
"repo": "https://git.zabbix.com/",
"vendor": "Zabbix",
"versions": [
{
"changes": [
{
"at": "7.0.28",
"status": "unaffected"
}
],
"lessThanOrEqual": "7.0.27",
"status": "affected",
"version": "7.0.0",
"versionType": "git"
},
{
"changes": [
{
"at": "7.4.12",
"status": "unaffected"
}
],
"lessThanOrEqual": "7.4.11",
"status": "affected",
"version": "7.4.0",
"versionType": "git"
}
]
}
],
"source": "security@zabbix.com"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:zabbix:zabbix:*:*:*:*:*:*:*:*",
"matchCriteriaId": "0F8E0DC9-9BF9-498D-A605-DD32B108867D",
"versionEndExcluding": "7.0.28",
"versionStartIncluding": "7.0.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:zabbix:zabbix:*:*:*:*:*:*:*:*",
"matchCriteriaId": "78A9BAC4-F37C-4D86-8887-0E8044E1F1B2",
"versionEndExcluding": "7.4.12",
"versionStartIncluding": "7.4.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A Zabbix administrator is able to read out of bounds memory by utilizing a flaw in script item/preprocessing (JavaScript) HttpRequest logic, leading to potential confidentiality loss."
}
],
"id": "CVE-2026-23935",
"lastModified": "2026-09-23T14:17:37.820",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 4.9,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "HIGH",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
},
"exploitabilityScore": 1.2,
"impactScore": 3.6,
"source": "nvd@nist.gov",
"type": "Primary"
}
],
"cvssMetricV40": [
{
"cvssData": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "ADJACENT",
"availabilityRequirement": "NOT_DEFINED",
"baseScore": 6.8,
"baseSeverity": "MEDIUM",
"confidentialityRequirement": "NOT_DEFINED",
"exploitMaturity": "NOT_DEFINED",
"integrityRequirement": "NOT_DEFINED",
"modifiedAttackComplexity": "NOT_DEFINED",
"modifiedAttackRequirements": "NOT_DEFINED",
"modifiedAttackVector": "NOT_DEFINED",
"modifiedPrivilegesRequired": "NOT_DEFINED",
"modifiedSubAvailabilityImpact": "NOT_DEFINED",
"modifiedSubConfidentialityImpact": "NOT_DEFINED",
"modifiedSubIntegrityImpact": "NOT_DEFINED",
"modifiedUserInteraction": "NOT_DEFINED",
"modifiedVulnAvailabilityImpact": "NOT_DEFINED",
"modifiedVulnConfidentialityImpact": "NOT_DEFINED",
"modifiedVulnIntegrityImpact": "NOT_DEFINED",
"privilegesRequired": "HIGH",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"source": "security@zabbix.com",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-23935",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-18T12:50:59.903092Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-08-18T13:17:21.843",
"references": [
{
"source": "security@zabbix.com",
"tags": [
"Vendor Advisory"
],
"url": "https://support.zabbix.com/browse/ZBX-28073"
}
],
"sourceIdentifier": "security@zabbix.com",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-125"
}
],
"source": "security@zabbix.com",
"type": "Secondary"
}
]
}
},
"vulnrichment": {
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-23935",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-18T12:50:59.903092Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-08-18T12:51:01.231Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unknown",
"modules": [
"Server"
],
"product": "Zabbix",
"repo": "https://git.zabbix.com/",
"vendor": "Zabbix",
"versions": [
{
"changes": [
{
"at": "7.0.28",
"status": "unaffected"
}
],
"lessThanOrEqual": "7.0.27",
"status": "affected",
"version": "7.0.0",
"versionType": "git"
},
{
"changes": [
{
"at": "7.4.12",
"status": "unaffected"
}
],
"lessThanOrEqual": "7.4.11",
"status": "affected",
"version": "7.4.0",
"versionType": "git"
}
]
}
],
"configurations": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eAn authenticated administrator using specifically crafted script item or JavaScript preprocessing scripts.\u003c/p\u003e"
}
],
"value": "An authenticated administrator using specifically crafted script item or JavaScript preprocessing scripts."
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "Zabbix wants to thank Aikido Security for submitting this report on the HackerOne bug bounty platform."
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eA Zabbix administrator is able to read out of bounds memory by utilizing a flaw in script item/preprocessing (JavaScript) HttpRequest logic, leading to potential confidentiality loss.\u003c/p\u003e"
}
],
"value": "A Zabbix administrator is able to read out of bounds memory by utilizing a flaw in script item/preprocessing (JavaScript) HttpRequest logic, leading to potential confidentiality loss."
}
],
"impacts": [
{
"capecId": "CAPEC-540",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-540: Overread Buffers"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "ADJACENT",
"baseScore": 6.8,
"baseSeverity": "MEDIUM",
"exploitMaturity": "NOT_DEFINED",
"privilegesRequired": "HIGH",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-125",
"description": "CWE-125: Out-of-bounds Read",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-18T12:19:38.955Z",
"orgId": "72de3e22-0555-4a0d-ae81-9249e0f0a1e8",
"shortName": "Zabbix"
},
"references": [
{
"url": "https://support.zabbix.com/browse/ZBX-28073"
}
],
"solutions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eUpdate the affected components to their respective fixed versions.\u003c/p\u003e"
}
],
"value": "Update the affected components to their respective fixed versions."
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "Use-after-free read in script item/preprocessing HttpRequest body",
"x_generator": {
"engine": "Vulnogram 1.0.4"
}
}
},
"cveMetadata": {
"assignerOrgId": "72de3e22-0555-4a0d-ae81-9249e0f0a1e8",
"assignerShortName": "Zabbix",
"cveId": "CVE-2026-23935",
"datePublished": "2026-08-18T12:19:38.955Z",
"dateReserved": "2026-01-19T14:03:13.686Z",
"dateUpdated": "2026-08-18T13:34:59.670Z",
"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…