CVE-2026-27775
HighPublic exploitGitea 1.25.5 caches a branch-specific write-permission result across multiple refs in one pre-receive hook session, allowing a per-branch maintainer-edit grant to be reused for other refs and escalate to full repository write access.
Published Jul 3, 2026 · Updated Aug 12, 2026 · Also known as EUVD-2026-41636, GHSA-649p-mmhf-85c7, GO-2026-6043
Key Facts
Patch immediately- CVE-2026-27775 is a high-severity vulnerability (CVSS 8.8 v3.1) affecting code.gitea.io/gitea (go), Gitea Open Source Git Server.
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 0.5% probability of exploitation in the next 30 days.
- Fixed versions are available, including code.gitea.io/gitea 1.26.3.
- Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
CVSS v3.1
8.8
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
0.5%
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2026-27775 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
Gitea 1.25.5 caches a branch-specific write-permission result across multiple refs in one pre-receive hook session, allowing a per-branch maintainer-edit grant to be reused for other refs and escalate to full repository write access.
Affected Products
3 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| code.gitea.io/giteago | See advisory | 1.26.3 |
| Gitea Open Source Git Server | >= 1.25.5 | n/a |
Patched Releases
code.gitea.io/gitea
1.26.3
Timeline
Publicly disclosed
Jul 3, 2026
Last updated
Aug 12, 2026
Weakness Type
- CWE-863 Incorrect Authorization
References
- advisoryhttps://blog.gitea.com/release-of-1.26.3-and-1.26.4
- advisoryGHSA advisory
- advisoryhttps://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27775.json
- advisoryhttps://github.com/go-gitea/gitea/commit/99f8b3d9a1d32f4c39828e07971455a18191e0b9
- advisoryhttps://github.com/go-gitea/gitea/security/advisories
FAQ
Common Questions.
Gitea 1.25.5 caches a branch-specific write-permission result across multiple refs in one pre-receive hook session, allowing a per-branch maintainer-edit grant to be reused for other refs and escalate to full repository write access.
Affected: code.gitea.io/gitea (go); Gitea Open Source Git Server versions >= 1.25.5. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including code.gitea.io/gitea 1.26.3.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Is CVE-2026-27775 Running On Your Attack Surface?
Brandefense maps vulnerabilities like this one to your internet-facing assets and tells you exactly where to patch.
Request A Demo