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Advisory record · GHSA-425g-fjhq-5h92

openssl-encrypt silently skips schema validation when jsonschema library is not installed

CVSS 9.3 CriticalCriticalEPSS 0.0027 · 19th percentile

Critical, because:

  • CVSS score 9.3: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 31 Mar 2026, 23:43 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
openssl-encryptPyPI<1.4.01.4.0
Identifiers
GHSA-425g-fjhq-5h92 · CVE-2026-74875 · PYSEC-2026-3755
Weakness (CWE)
CWE-20 · CWE-345
Tags
Published
31 Mar 2026
Updated
2 Sept 2026

Machine-written summary

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

Affected: openssl-encrypt versions before 1.4.0. In the json_validator module, schema validation is silently skipped when the jsonschema library is not installed, and metadata with unknown format versions bypasses validation entirely. An attacker who can change the Python environment or supply crafted metadata can get malicious or malformed metadata accepted without checks. Upgrade to openssl-encrypt 1.4.0, which raises an error instead of skipping validation when jsonschema is unavailable.

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 0.0027, the 19th percentile, on 9 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.