CVE-2026-27775

High

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.

SeverityHigh

CVSS8.8

Exploit probability—

ProductCode.gitea.io/gitea

PublishedJul 3, 2026

First seenJul 3, 2026

Weakness typeCWE-863Incorrect authorization

How to fix

Update

code.gitea.io/gitea1.26.3 or later

Patches

github.com/go-gitea/gitea/pull/38151

Vendor advisories

github.com/go-gitea/gitea/security/advisories/GHSA-649p-mmhf-85c7
github.com/go-gitea/gitea/releases/tag/v1.26.3
blog.gitea.com/release-of-1.26.3-and-1.26.4/

Affected products

Product	Affected versions	Fixed in
code.gitea.io/giteaGo	v < 1.26.3	1.26.3

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