CVE-2026-13758

CryptX for Perl versions before 0.088_001 are vulnerable to a timing attack in the streaming decrypt_done path. The software uses memNE (memcmp() != 0) to compare AEAD authentication tags, which short-circuits on the first differing byte. This creates a tag-verification oracle where an attacker m...

CVE-2026-13758 CryptX versions before 0.088_001 for Perl compare AEAD authentication tags in non-constant time in the streaming decrypt_done path

CryptX versions before 0.088001 for Perl compare AEAD authentication tags in non-constant time in the streaming decryptdone path. The decryptdone$tag form compares it against the computed tag with memNE memcmp != 0, which short-circuits on the first differing byte, so its run time depends on the...

PT-2026-53736

Name of the Vulnerable Software and Affected Versions CryptX versions prior to 0.088 001 Description CryptX for Perl performs AEAD authentication tag comparisons in non-constant time within the streaming decrypt done path. The decrypt done$tag function utilizes memNE based on memcmp != 0, which...