Paper/Archive/CVE-2026-20912

CVE-2026-20912

Gitea Gitea Open Source Git Server — Gitea: Cross-Repository Authorization Bypass via Release Attachment Linking Leads to Private Attachment Disclosure

EPSS 0.5%CVSS 9.1

critical.is priorityof 100

CVSS 9.1 (ADP, CNA agree)9.1 / 10 × 3027.3 Not in CISA KEV+300.0 EPSS percentile 39.5.395 × 207.9 No public exploit+100.0 SSVC exploitation: none+100.0

Description · from the CVE record

Gitea does not properly validate repository ownership when linking attachments to releases. An attachment uploaded to a private repository could potentially be linked to a release in a different public repository, making it accessible to unauthorized users.

Affected

ProductAffectedFixed inSource

Gitea Open Source Git Server≤ 1.25.3–CNA

OpenShift Pipelinessee advisory–redhat-SADP

Scores by source

CISA ADP9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

redhat-SADP (CNA)9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

advisorygithub.com/go-gitea/gitea/security/advisories/GHSA-vfmv-f93v-37mw patchgithub.com/go-gitea/gitea/pull/36320 patchgithub.com/go-gitea/gitea/pull/36355 refgithub.com/go-gitea/gitea/releases/tag/v1.25.4 refblog.gitea.com/release-of-1.25.4 refaccess.redhat.com/security/cve/CVE-2026-20912 refbugzilla.redhat.com/show_bug.cgi?id=2432219 refsecurity.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-20912.json