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CVE PROGRAM SOURCE RECORD9.3 Critical

CVE-2026-74900

openssl_encrypt before 1.4.0 Weak Shared Secret via PQC Simulation Mode

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Status
Published
Published
Updated
Assigning organization
VulnCheck

Description

openssl_encrypt versions before 1.4.0 contain a critical vulnerability in pqc.py where KEM decapsulation failures silently fall back to simulation mode, generating a deterministic shared secret from only 16 bytes of the private key and publicly available encapsulated key data. Attackers who obtain 16 bytes of the private key can compute the shared secret and decrypt all ciphertext, as the fallback triggers on any KEM failure without raising an error.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

jahlives openssl_encrypt

Default version status: unaffected

  • 0 to < 1.4.0affected
  • 1.4.0unaffected
pkg:pypi/openssl_encrypt

References