CVE-2026-5845
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
Improper authorization fallback allows scoped user-to-server token installation escape in GitHub Enterprise Server
An improper authorization vulnerability in scoped user-to-server (ghu_) token authorization in GitHub Enterprise Server allows an authenticated attacker to access private repositories outside the intended installation scope, which can include write operations, via an authorization fallback that treated a revoked/deleted installation as a global installation context, which could be chained with token revocation timing and SSH push attribution to obtain and reuse a victim-scoped token. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.21 and was fixed in versions 3.20.1, 3.19.5, 3.18.8, 3.17.14, 3.16.17, 3.15.21, and 3.14.26. This vulnerability was reported via the GitHub Bug Bounty program.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Enterprise Server
- Vendor
- GitHub
- Product
- Enterprise Server
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 3.20.0 | affected | semver | 3.20.1 | Unavailable |
|
| 3.19.0 | affected | semver | Unavailable | 3.19.4 |
|
| 3.18.0 | affected | semver | Unavailable | 3.18.7 |
|
| 3.17.0 | affected | semver | Unavailable | 3.17.13 |
|
| 3.16.0 | affected | semver | Unavailable | 3.16.16 |
|
| 3.15.0 | affected | semver | Unavailable | 3.15.20 |
|
| 3.14.0 | affected | semver | Unavailable | 3.14.25 |
|