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openssl_encrypt versions before 1.4.9 fail to validate encryption status of embedded post-quantum private keys in file m

openssl_encrypt versions before 1.4.9 fail to validate encryption status of embedded post-quantum private keys in file metadata. Attackers can craft files with unencrypted embedded PQC keys that decrypt under any password, bypassing authentication and producing attacker-chosen plaintext with false integrity verification.

CVE-2026-81703Published 1 week agoUpdated 4 days agoSource: OSV

Affected packages

  • openssl-encryptbefore 1.4.9

Exploit signal

Known exploited (CISA KEV)
No
EPSS score
EPSS percentile

EPSS is the probability a CVE is exploited in the wild; percentile is its rank among all CVEs.

openssl_encrypt versions before 1.4.9 fail to validate encryption status of embedded post-quantum private keys in file m | HackTribune