CVE-2026-81701 CRITICAL

CVE-2026-81701: openssl_encrypt before 1.4.9 Arbitrary Code Execution via unsigned plugin

Vendor Jahlives

Product openssl_encrypt

Weakness CWE-347

Published August 27, 2026

Last update August 27, 2026

View on NVD All CVEs

CVSS base score

9.3/10

Attack vector Network

Attack complexity Low

Privileges required None

User interaction None

Confidentiality —

Integrity —

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

August 27, 2026 CVE published

August 27, 2026 Record updated

External resources

03References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2026-81701 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/347.html AskarLabs — CWE-347 write-up Improper Verification of Cryptographic Signature

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