Arbitrary Code Execution in openssl_encrypt by Unsigned Plugins
CVE-2026-81701

9.3CRITICAL

Key Information:

Vendor

Jahlives

Status
OpenSSL Encrypt
Vendor
CVE Published:
27 August 2026

What is CVE-2026-81701?

The openssl_encrypt product versions prior to 1.4.9 have a significant vulnerability that permits unsigned plugins to bypass signature verification. This lack of stringent checks enables attackers to introduce malicious unsigned plugins into the top-level plugins directory or into unknown subdirectories. Once executed, these plugins can lead to arbitrary code execution in the command-line interface (CLI) process, allowing unauthorized access to sensitive information such as passwords and cryptographic keys. It is crucial for users to upgrade to newer versions to eliminate this risk.

Affected Version(s)

openssl_encrypt 0 < 1.4.9

openssl_encrypt 1.4.9

References

https://github.com/jahlives/openssl_encrypt/security/advi...
vendor-advisory
https://www.vulncheck.com/advisories/openssl-encrypt-befo...
third-party-advisory

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.