EUVD-2026-69715
GHSA-4fq5-hf84-xr75
Severity by source
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/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
Race condition requires precise concurrent request timing (AC:H); repository write access mandatory (PR:L); RCE delivers full CIA impact on the vulnerable system.
Primary rating from Vendor (GitHub_P).
CVSS VectorVendor: GitHub_P
Lifecycle Timeline
2DescriptionCVE.org
A time-of-check time-of-use race condition vulnerability was identified in GitHub Enterprise Server that allowed remote code execution. Exploitation required an authenticated user with write access to a repository and precise timing of concurrent upload requests. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.22 and was fixed in versions 3.17.20, 3.18.14, 3.19.11, 3.20.7, 3.21.5, and 3.22.0. This vulnerability was reported via the GitHub Bug Bounty program.
AnalysisAI
Remote code execution via a time-of-check time-of-use race condition in GitHub Enterprise Server affects all versions prior to 3.22. An authenticated user holding repository write access can trigger the vulnerability by issuing precisely timed concurrent upload requests, exploiting the window between a security check and the file operation it guards. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated GitHub Enterprise Server account with write access to at least one repository on the target instance. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:N/AC:L/AT:P/PR:L/UI:N, score 7.7) presents a nuanced picture: network accessibility and no required victim interaction are offset by AT:P (precise timing prerequisites) and PR:L (repository write access required). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the vendor-released patches immediately. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: audit and restrict repository write access across all GHES instances to essential personnel only; enable detailed audit logging for all file upload operations. …
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