CVE-2026-81703CWE-287

CVE-2026-81703

Medium · published August 27, 2026

CVSS v3.1
5.5
EPSS
0%
Percentile
12.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.5 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
CVSS v4.0
8.7 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
EPSS
0.00223 · 12.3th percentile
Weakness
CWE-287 · Improper Authentication
Published
2026-08-27T21:21Z
Affected products (1)
ProductVersionsFixed in
jahlives/openssl_encrypt< 1.4.91.4.9
References (2)
https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-qqfq-g2cv-j7v3 · [email protected]https://www.vulncheck.com/advisories/openssl-encrypt-before-1.4.9-authentication-bypass-via-unencrypted-pqc-key · [email protected]
EPSS history
Timeline
  • 27 AUG 14:51Z
    openssl_encrypt before 1.4.9 Authentication Bypass via Unencrypted PQC Key
    cvelistv5