CVE-2026-3306
Improper authorization in GitHub Projects allows modification of issue and pull request metadata without repository write access
- 5.3MediumCVSS base score
- 0.40%Exploitation in 30 daysEPSS · top 65% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
An improper authorization vulnerability was identified in GitHub Enterprise Server that allowed a user with read access to a repository and write access to a project to modify issue and pull request metadata through the project. When adding an item to a project that already existed, column value updates were applied without verifying the actor's repository write permissions. This vulnerability was reported via the GitHub Bug Bounty program and has been fixed in GitHub Enterprise Server versions 3.14.24, 3.15.19, 3.16.15, 3.17.12, 3.18.6 and 3.19.3.
Timeline
ID reserved
By GitHub_P
- 12 days later
· 12 days later
Published
- 1 day later
· 1 day later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_PCNA (assigner) | 4.0 | Medium5.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N |
| NVDNVD · Analyzed | 4.0 | Medium5.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/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 |
- EPSS (exploitation in 30 days)
- 0.40% · top 65% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.
Affected products
- affected 3.14.0 – ≤ 3.14.23
- affected 3.15.0 – ≤ 3.15.18
- affected 3.16.0 – ≤ 3.16.14
- affected 3.17.0 – ≤ 3.17.11
- affected 3.18.0 – ≤ 3.18.5
- affected 3.19.0 – ≤ 3.19.2
References
References6
- https://docs.github.com/en/[email protected]/admin/release-notes#3.14.24 (opens in a new tab)
- https://docs.github.com/en/[email protected]/admin/release-notes#3.15.19 (opens in a new tab)
- https://docs.github.com/en/[email protected]/admin/release-notes#3.16.15 (opens in a new tab)
- https://docs.github.com/en/[email protected]/admin/release-notes#3.17.12 (opens in a new tab)
- https://docs.github.com/en/[email protected]/admin/release-notes#3.18.6 (opens in a new tab)
- https://docs.github.com/en/[email protected]/admin/release-notes#3.19.3 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-10742 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-3306)Record last updated .