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CVE-2026-6331

HIGH · CVSS 7.5 EPSS %0.15 Public Exploit

Kaynak: NVD + CISA KEV + EPSS · Yayınlanma: 2026-06-25T22:17:03.010 · Çekilme zamanı: 2026-06-30T18:34:45.679244+00:00

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Public Exploit Sinyali

Bu CVE için açıklama veya referanslarda public exploit / PoC / GitHub / Metasploit sinyali tespit edildi.

GitHub PoC Linkleri

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CVE
CVE-2026-6331
Severity
HIGH
CVSS
7.5
EPSS
%0.15
OpenSSL

Orijinal NVD Açıklaması

HMAC zero-length tag forgery in EVP_DigestVerifyFinal, where a zero-length tag could be accepted as valid during HMAC verification. In the OpenSSL-compatibility HMAC verify path the supplied signature length was only checked as not exceeding the MAC length, so a zero-length or otherwise truncated tag could pass verification. The fix requires the supplied tag length to exactly equal the MAC length and rejects a zero-length MAC, so a forged short or empty tag is no longer accepted.