Gitea push mirror SSRF and forced writes to internal Git hosts

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-89430
StatePUBLISHED
AssignerGitea
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-06 20:17:34 UTC
Updated2026-10-06 20:17:34 UTC
DescriptionGitea validated a push mirror's remote address against the `[migrations]` allow and block lists only when the mirror was created. Each synchronization passed the stored address directly to `git push`, so a name that later resolved to a blocked or internal address was still reached. A user with administrator access to a repository, which includes repositories they create themselves, could aim push mirror synchronization at internal Git services and force-push the repository's contents to them.

Risk And Classification

Problem Types: CWE-367 | CWE-918 | CWE-367 CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition | CWE-918 CWE-918: Server-Side Request Forgery (SSRF)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Gitea Gitea affected 1.27.3 semver Not specified

References

ReferenceSourceLinkTags
github.com/go-gitea/gitea/releases/tag/v28.0.0 88ee5874-cf24-4952-aea0-31affedb7ff2 github.com
github.com/go-gitea/gitea/security/advisories/GHSA-hcgw-r9gf-8mph 88ee5874-cf24-4952-aea0-31affedb7ff2 github.com
github.com/go-gitea/gitea/pull/39010 88ee5874-cf24-4952-aea0-31affedb7ff2 github.com
github.com/go-gitea/gitea/pull/39426 88ee5874-cf24-4952-aea0-31affedb7ff2 github.com
blog.gitea.com/release-of-28.0.0 88ee5874-cf24-4952-aea0-31affedb7ff2 blog.gitea.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: https://github.com/thesmartshadow (en)

CNA: https://github.com/manus-use (en)

CNA: https://github.com/cy3erm (en)

CNA: https://github.com/TheFox0x7 (en)

CNA: https://github.com/silverwind (en)

CNA: https://github.com/bircni (en)

CNA: https://github.com/wxiaoguang (en)

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