CVE-2026-81701CWE-347

CVE-2026-81701

Critical · published August 27, 2026

CVSS v3.1
9.8
EPSS
0%
Percentile
35.8
In the wild
Unconfirmed
What it is

openssl_encrypt versions before 1.4.9 use a denylist to identify trusted built-in plugins, allowing unsigned plugins in top-level plugins/ directories and unknown subdirectories to bypass signature verification. Attackers can place malicious unsigned plugins following documented installation paths to achieve arbitrary code execution in the CLI process with access to passwords and cryptographic keys.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
9.3 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.00426 · 35.8th percentile
Weakness
CWE-347 · Improper Verification of Cryptographic Signature
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-wxx9-p55f-wm34 · [email protected]https://www.vulncheck.com/advisories/openssl-encrypt-before-1.4.9-arbitrary-code-execution-via-unsigned-plugin · [email protected]
EPSS history
Timeline
  • 27 AUG 14:51Z
    openssl_encrypt before 1.4.9 Arbitrary Code Execution via unsigned plugin
    cvelistv5