openssl_encrypt versions before 1.4.9 fail to escape attacker-controlled key_id values printed to stderr during decrypt auto-detection. Attackers can craft encrypted files with malicious key_id containing escape sequences to repaint terminal output and forge authenticity verification blocks.
CRITICAL
Vulnerability intelligence
CVE-2026-81695
CVSS 4.09.3
SeverityCritical
Known exploitedNo
NVD references:
Primary source: NIST National Vulnerability Database