openssl: CMS AuthEnvelopedData Processing May Accept Forged Messages

A flaw was found in OpenSSL's Cryptographic Message Services CMS AuthEnvelopedData processing. An on-path attacker can exploit insufficient input validation on cipher and tag length fields by sending specially crafted CMS messages. This can lead to the forging of messages or bypassing integrity...

EUVD-2026-35478

Issue Summary: Cryptographic Message Services CMS processing fails to perform sufficient input validation on the cipher and tag length fields of AuthEnvelopedData containers, leading to various potential compromises. Impact Summary: Attackers making use of these vulnerabilities may achieve...

ALPINE-CVE-2026-34182

Issue Summary: Cryptographic Message Services CMS processing fails to perform sufficient input validation on the cipher and tag length fields of AuthEnvelopedData containers, leading to various potential compromises. Impact Summary: Attackers making use of these vulnerabilities may achieve...

CVE-2026-34182

CVE-2026-34182 describes a vulnerability in CMS AuthEnvelopedData processing in OpenSSL where insufficient input validation on cipher and tag length can allow forged or manipulated messages. Attack scenarios include selecting non-AEAD ciphers (e.g., AES-256-OFB) that bypasses integrity checks and...

PT-2026-47831

Name of the Vulnerable Software and Affected Versions OpenSSL affected versions not specified Description Cryptographic Message Services CMS processing fails to perform sufficient input validation on the cipher and tag length fields of AuthEnvelopedData containers. This allows attackers to achiev...