CVE-2026-19118
published 2026-09-01CVE-2026-19118: A time-of-check time-of-use race condition vulnerability was identified in GitHub Enterprise Server that allowed remote code execution. Exploitation required…
PriorityP354high7.5CVSS 3.1
AVNACHPRLUINSUCHIHAH
EPSS
0.53%
43.7th percentile
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, and 3.21.5. This vulnerability was reported via the GitHub Bug Bounty program.
Affected
10 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| github | enterprise_server | < 3.17.20 | 3.17.20 |
| github | enterprise_server | 3.17.0 – 3.17.19 | — |
| github | enterprise_server | >= 3.18.0 < 3.18.14 | 3.18.14 |
| github | enterprise_server | 3.18.0 – 3.18.13 | — |
| github | enterprise_server | >= 3.19.0 < 3.19.11 | 3.19.11 |
| github | enterprise_server | 3.19.0 – 3.19.10 | — |
| github | enterprise_server | >= 3.20.0 < 3.20.7 | 3.20.7 |
| github | enterprise_server | 3.20.0 – 3.20.6 | — |
| github | enterprise_server | >= 3.21.0 < 3.21.5 | 3.21.5 |
| github | enterprise_server | 3.21.0 – 3.21.4 | — |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
nvdv4.07.7HIGHCVSS: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
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GHSA
A time-of-check time-of-use race condition vulnerability was identified in GitHub Enterprise Server that allowed remote code execution.
ghsa_unreviewed·2026-09-02
CVE-2026-19118 [HIGH] CWE-367 A time-of-check time-of-use race condition vulnerability was identified in GitHub Enterprise Server that allowed remote code execution.
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.
VulDB
GitHub Enterprise Server up to 3.21.x race condition (EUVD-2026-69715)
vuldb·2026-09-02·CVSS 7.7
CVE-2026-19118 [HIGH] GitHub Enterprise Server up to 3.21.x race condition (EUVD-2026-69715)
A vulnerability was found in GitHub Enterprise Server up to 3.21.x. It has been declared as critical. The affected element is an unknown function. Executing a manipulation can lead to race condition.
This vulnerability is tracked as CVE-2026-19118. The attack can be launched remotely. No exploit exists.
It is recommended to upgrade the affected component.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://docs.github.com/en/[email protected]/admin/release-notes#3.17.20https://docs.github.com/en/[email protected]/admin/release-notes#3.18.14https://docs.github.com/en/[email protected]/admin/release-notes#3.19.11https://docs.github.com/en/[email protected]/admin/release-notes#3.20.7https://docs.github.com/en/[email protected]/admin/release-notes#3.21.5
2026-09-01
Published