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Advisory record · GHSA-jgxc-8mwq-9xqw

Clojure classes can be used to craft a serialized object that runs arbitrary code on deserialization

CVSS 9.8 CriticalCriticalEPSS 0.013 · 71st percentile

Critical, because:

  • CVSS score 9.8: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 22 Jan 2024, 06:30 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.clojure:clojureMaven<1.9.01.9.0
Identifiers
GHSA-jgxc-8mwq-9xqw · CVE-2017-20189
Weakness (CWE)
CWE-502
Tags
Published
22 Jan 2024
Updated
4 Nov 2025

Machine-written summary

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

The org.clojure:clojure package is vulnerable in versions before 1.9.0. An attacker who can supply serialized objects to an application that deserializes untrusted data can craft one that executes arbitrary code when deserialized. The source gives few details beyond this. Upgrade to version 1.9.0 or later.

Written 7 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
9.8 Critical 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H GitHub Advisory Database
  • CISA KEV Not listed.
  • EPSS 0.013, the 71st percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 15:10 UTC First seen by agentprime
  2. 31 Oct 2026, 15:10 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.