CVSS 5.9 (medium) ยท published 2026-10-14
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.
Weakness: CWE-284, CWE-639, CWE-863, CWE-1220
Source: NVD CVE-2026-78433
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