CVE-2026-9312

A server-side request forgery (SSRF) vulnerability was identified in GitHub Enterprise Server that allowed an unauthenticated attacker to send crafted requests to internal services by exploiting insufficient input validation in an upload endpoint. By injecting path traversal content into request parameters, an attacker could bypass the intended request flow and redirect internal API calls, potentially accessing internal services and exposing sensitive credentials. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.22 and was fixed in versions 3.17.17, 3.18.11, 3.19.8, 3.20.4, and 3.21.2. This vulnerability was reported via the GitHub Bug Bounty program.

CVSS v3 8.2 HIGH

8.2^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.17	Product Release Notes
https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.11	Product Release Notes
https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.8	Product Release Notes
https://docs.github.com/en/enterprise-server@3.20/admin/release-notes#3.20.4	Product Release Notes
https://docs.github.com/en/enterprise-server@3.21/admin/release-notes#3.21.2

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:github:enterprise_server::::::::
	cpe:2.3:a:github:enterprise_server::::::::
	cpe:2.3:a:github:enterprise_server::::::::
	cpe:2.3:a:github:enterprise_server::::::::
	cpe:2.3:a:github:enterprise_server::::::::
	cpe:2.3:a:github:enterprise_server:3.21.1:rc1::::::

History

No history.

Information

Published : 2026-05-27 00:16

Updated : 2026-07-23 11:10

NVD link : CVE-2026-9312

Mitre link : CVE-2026-9312

CVE.ORG link : CVE-2026-9312

JSON object : View

Products Affected

github

enterprise_server

CWE

CWE-918

Server-Side Request Forgery (SSRF)

{"id": "CVE-2026-9312", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-9312", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-05-27T00:00:00+00:00"}}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.2, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 4.2, "exploitabilityScore": 3.9}], "cvssMetricV40": [{"type": "Secondary", "source": "product-cna@github.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 9.2, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/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", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "product-cna@github.com", "affectedData": [{"vendor": "GitHub", "product": "Enterprise Server", "versions": [{"status": "affected", "changes": [{"at": "3.16.20", "status": "unaffected"}], "version": "3.16.0", "versionType": "semver", "lessThanOrEqual": "3.16.19"}, {"status": "affected", "changes": [{"at": "3.17.17", "status": "unaffected"}], "version": "3.17.0", "versionType": "semver", "lessThanOrEqual": "3.17.16"}, {"status": "affected", "changes": [{"at": "3.18.11", "status": "unaffected"}], "version": "3.18.0", "versionType": "semver", "lessThanOrEqual": "3.18.10"}, {"status": "affected", "changes": [{"at": "3.19.8", "status": "unaffected"}], "version": "3.19.0", "versionType": "semver", "lessThanOrEqual": "3.19.7"}, {"status": "affected", "changes": [{"at": "3.20.4", "status": "unaffected"}], "version": "3.20.0", "versionType": "semver", "lessThanOrEqual": "3.20.3"}, {"status": "affected", "changes": [{"at": "3.21.1", "status": "unaffected"}], "version": "3.21.0", "lessThan": "3.21.1", "versionType": "semver"}], "defaultStatus": "affected"}]}], "published": "2026-05-27T00:16:39.020", "references": [{"url": "https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.17", "tags": ["Product", "Release Notes"], "source": "product-cna@github.com"}, {"url": "https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.11", "tags": ["Product", "Release Notes"], "source": "product-cna@github.com"}, {"url": "https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.8", "tags": ["Product", "Release Notes"], "source": "product-cna@github.com"}, {"url": "https://docs.github.com/en/enterprise-server@3.20/admin/release-notes#3.20.4", "tags": ["Product", "Release Notes"], "source": "product-cna@github.com"}, {"url": "https://docs.github.com/en/enterprise-server@3.21/admin/release-notes#3.21.2", "source": "product-cna@github.com"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "product-cna@github.com", "description": [{"lang": "en", "value": "CWE-918"}]}], "descriptions": [{"lang": "en", "value": "A server-side request forgery (SSRF) vulnerability was identified in GitHub Enterprise Server that allowed an unauthenticated attacker to send crafted requests to internal services by exploiting insufficient input validation in an upload endpoint. By injecting path traversal content into request parameters, an attacker could bypass the intended request flow and redirect internal API calls, potentially accessing internal services and exposing sensitive credentials. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.22 and was fixed in versions 3.17.17, 3.18.11, 3.19.8, 3.20.4, and 3.21.2. This vulnerability was reported via the GitHub Bug Bounty program."}, {"lang": "es", "value": "Una vulnerabilidad de falsificaci\u00f3n de petici\u00f3n del lado del servidor (SSRF) fue identificada en GitHub Enterprise Server que permit\u00eda a un atacante no autenticado enviar peticiones manipuladas a servicios internos explotando una validaci\u00f3n de entrada insuficiente en un punto final de carga. Al inyectar contenido de salto de ruta en los par\u00e1metros de la petici\u00f3n, un atacante podr\u00eda eludir el flujo de petici\u00f3n previsto y redirigir llamadas internas a la API, accediendo potencialmente a servicios internos y exponiendo credenciales sensibles. Esta vulnerabilidad afect\u00f3 a todas las versiones de GitHub Enterprise Server anteriores a la 3.22 y fue corregida en las versiones 3.16.20, 3.17.17, 3.18.11, 3.19.8, 3.20.4 y 3.21.1. Esta vulnerabilidad fue reportada a trav\u00e9s del programa de recompensas por errores de GitHub."}], "lastModified": "2026-07-23T11:10:00.120", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5E49E067-C9D1-4F1C-A2CF-07FE4BF914C3", "versionEndExcluding": "3.16.19", "versionStartIncluding": "3.16.0"}, {"criteria": "cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5FBFDB4E-1878-499C-9D00-52E9C074F3C9", "versionEndExcluding": "3.17.16", "versionStartIncluding": "3.17.0"}, {"criteria": "cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B3D5BD25-0F18-4915-9399-D42302247396", "versionEndExcluding": "3.18.10", "versionStartIncluding": "3.18.0"}, {"criteria": "cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4FF939CE-B42A-4091-ACF0-AF80FFBFDC25", "versionEndExcluding": "3.19.7", "versionStartIncluding": "3.19.0"}, {"criteria": "cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "BA3298CD-3841-491D-8056-7AC03FC6473F", "versionEndExcluding": "3.20.3", "versionStartIncluding": "3.20.0"}, {"criteria": "cpe:2.3:a:github:enterprise_server:3.21.1:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E414D970-938C-4D0A-8457-EC880C2B6282"}], "operator": "OR"}]}], "sourceIdentifier": "product-cna@github.com"}