CVE Watch2 de nov. de 2026

CVE-2026-109553

Gitea resolved the principals of an SSH certificate by searching the content of all stored public keys instead of only principal keys. When

CVSS

7.5

Alta

EPSS

0.2%

KEV

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Exploit Today

0-100

Publicado: 18 de out. de 2026 · Última mod.: 2 de nov. de 2026 · CWE-287

EPSS · 30d

0.1%EPSS · 30 dias0.2%

2026-10-192026-11-06

Descrição técnica

Gitea resolved the principals of an SSH certificate by searching the content of all stored public keys instead of only principal keys. When Gitea trusts a user certificate authority (`SSH_TRUSTED_USER_CA_KEYS`) and accepts arbitrary principals (`SSH_AUTHORIZED_PRINCIPALS_ALLOW=anything`), a user could register another user's public key line as their own principal, or a holder of a certificate signed by that authority could list it, and then authenticate as the owner of that key through the HTTP signature API and the built-in SSH server. Instances that do not trust a user certificate authority are not affected.

Referências oficiais

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