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CVE-2026-78433
Gitea private attachment disclosure through repository mismatch
Medium5.9EPSS 0.37%
- Published
- Updated
- Reserved
- Assigned by
- Gitea
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Medium5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |
| NVDNVD · Deferred | 3.1 | Medium5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |
- EPSS (exploitation in 30 days)
- 0.37% · top 69% of all CVEs (5 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.9.
Weakness
- CWE-284: Improper Access Control (opens in a new tab)All about CWE-284 and its CVEs
- CWE-639: Authorization Bypass Through User-Controlled Key (opens in a new tab)All about CWE-639 and its CVEs
- CWE-863: Incorrect Authorization (opens in a new tab)All about CWE-863 and its CVEs
- CWE-1220: Insufficient Granularity of Access Control (opens in a new tab)All about CWE-1220 and its CVEs
Affected products
References (5)
- GitHub Security Advisory GHSA-frpv-2xgv-wxpq (opens in a new tab)vendor-advisory
- Gitea 1.27.3 release announcement (opens in a new tab)release-notes
- Fix: go-gitea/gitea pull request #39048 (opens in a new tab)patch
- Fix: go-gitea/gitea pull request #39077 (opens in a new tab)patch
- go-gitea/gitea v1.27.3 release (opens in a new tab)release-notes
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-78433)Record last updated .