by Kastro
Paper/Archive/CVE-2026-81701

CVE-2026-81701

jahlives openssl_encrypt — openssl_encrypt before 1.4.9 Arbitrary Code Execution via unsigned plugin

EPSS 0.4%CVSS 9.8
critical.is priorityof 100
37
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 36.8.368 × 207.4No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
openssl_encrypt< 1.4.91.4.9CNA

Scores by source

VulnCheck (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
VulnCheck (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

advisorygithub.com/jahlives/openssl_encrypt/security/advisories/GHSA-wxx9-p55f-wm34writeupvulncheck.com/advisories/openssl-encrypt-before-1.4.9-arbitrary-code-execution-via-unsigned-plugin