What’s Vulnerable › Vulnerabilities

CVE-2026-78433: Gitea private attachment disclosure through repository mismatch

• Severity: medium (CVSS 5.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-14 · updated 2026-10-18
• Weakness: CWE-284

Description

Gitea's web attachment handler skips its cross-repository ownership check for attachments created before 16 January 2026 and checks permissions against the repository named in the request URL instead. An unauthenticated attacker who knows a private attachment's UUID can request it through a public repository's attachment path and retrieve its contents. This can expose issue and pull request attachments or release assets; the random attachment UUID must already be known to the attacker.

Affected products

• Gitea Open Source Git Server: from 1.26.0 through 1.27.2

References

• https://blog.gitea.com/release-of-1.27.3/
• https://github.com/go-gitea/gitea/pull/39048
• https://github.com/go-gitea/gitea/pull/39077
• https://github.com/go-gitea/gitea/releases/tag/v1.27.3
• https://github.com/go-gitea/gitea/security/advisories/GHSA-frpv-2xgv-wxpq

Get alerted when CVE-2026-78433 or the next vulnerability affects your stack