Gitea private attachment disclosure through repository mismatch
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.
CVE-2026-78433
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-78433
Gitea
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "Gitea",
"product": "Gitea",
"versions": [
{
"status": "affected",
"version": "1.26.0",
"versionType": "semver",
"lessThanOrEqual": "1.27.2"
}
],
"packageName": "gitea.dev",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-78433
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #34736 · Revision 1
- Added to Heist Feed
- Publisher date