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OpenAdvisories
Medium · 5.5 CVE-2026-81703 EUVD-2026-67059GHSA-crr6-63rq-gf5qGHSA-qqfq-g2cv-j7v3PYSEC-2026-3779

openssl_encrypt before 1.4.9 Authentication Bypass via Unencrypted PQC Key

Published Aug 27, 2026 · Updated Oct 1, 2026 · Assigned by VulnCheck

Description

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.

Affected products

VendorProductAffectedFixed
jahlives openssl_encrypt < 1.4.9 1.4.9

Affected packages

EcosystemPackageAffectedFixedRecord
PyPI openssl-encrypt < 1.4.9 1.4.9 PYSEC-2026-3779

References