CVE-2026-81718CWE-326

CVE-2026-81718

High · published August 27, 2026

CVSS v3.1
7.5
EPSS
0%
Percentile
3.0
In the wild
Unconfirmed
What it is

openssl_encrypt versions before 1.4.9 use under-parameterized PBKDF2-HMAC-SHA256 with only 100,000 iterations to protect PQC keyfile private keys and 10,000 iterations for dual-encryption file-password verification. Attackers who obtain keyfiles or encrypted files can brute-force wrapping passwords offline using GPU or ASIC acceleration.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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
0.00131 · 3.0th percentile
Weakness
CWE-326 · Inadequate Encryption Strength
Published
2026-08-27T21:21Z
References (2)
https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-fmjx-p826-6fvr · [email protected]https://www.vulncheck.com/advisories/openssl-encrypt-before-1.4.9-weak-cryptographic-parameters · [email protected]
EPSS history
Timeline
  • 27 AUG 14:51Z
    openssl_encrypt before 1.4.9 Weak Cryptographic Parameters
    cvelistv5