CVE-2026-53431 Boruta accepts expired JWT client assertions due to missing exp claim validation

Authentication Bypass by Capture-replay vulnerability in malach-it Boruta allows an attacker who has obtained a previously valid JWT client assertion to authenticate as the issuing OAuth client after the assertion has expired. Boruta accepts JWT-based client authentication clientsecretjwt and...

CVE-2026-53431: Authentication Bypass by Capture-replay

Authentication Bypass by Capture-replay vulnerability in malach-it Boruta allows an attacker who has obtained a previously valid JWT client assertion to authenticate as the issuing OAuth client after the assertion has expired. Boruta accepts JWT-based client authentication clientsecretjwt and...