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Advisory record · GHSA-587j-4r3v-cm2c

openssl_encrypt before 1.4.9 executes untrusted third-party plugins with insufficient controls: the plugin signature policy defaulted to WARN, so an unsigned/unverifiable non-built-in plugin was co...

CVSS 9.3 CriticalCriticalEPSS 0.0044 · 38th percentile

Critical, because:

  • CVSS score 9.3: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 27 Aug 2026, 17:21 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
openssl-encryptPyPI<1.4.91.4.9
Identifiers
GHSA-587j-4r3v-cm2c · CVE-2026-81719 · PYSEC-2026-3802
Weakness (CWE)
CWE-94
Tags
Published
27 Aug 2026
Updated
3 Sept 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

openssl-encrypt before 1.4.9 loads third-party plugins without enforcing signature checks by default, so unsigned or unverifiable plugins are compiled and run in the host process. An attacker who can get a user to load a malicious plugin could execute arbitrary code with that user's privileges. Upgrade to openssl-encrypt 1.4.9, which enforces plugin signatures by default for non-built-in plugins.

Written 5 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
9.3 Critical 4.0 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 CNA (VulnCheck)
  • CISA KEV Not listed.
  • EPSS 0.0044, the 38th percentile, on 12 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:38 UTC First seen by agentprime
  2. 31 Oct 2026, 14:38 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.