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Advisory record · GHSA-xwmg-2g98-w7v9

Nimbus JOSE + JWT is vulnerable to DoS attacks when processing deeply nested JSON

CVSS 5.8 MediumEPSS 0.0098 · 62nd percentile

Published by the GitHub Advisory Database at 11 Jul 2025, 03:30 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
com.nimbusds:nimbus-jose-jwtMaven>=9.38-rc1, <10.0.2 || <9.37.410.0.2, 9.37.4
Identifiers
GHSA-xwmg-2g98-w7v9 · CVE-2025-53864
Weakness (CWE)
CWE-674
Tags
Published
11 Jul 2025
Updated
10 Sept 2026

Machine-written summary

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

Nimbus JOSE + JWT versions from 9.38-rc1 before 10.0.2 and versions before 9.37.4 are vulnerable to denial of service. A remote attacker can supply a JWT whose claim set contains a deeply nested JSON object, causing uncontrolled recursion that exhausts resources. Upgrade to version 10.0.2 or 9.37.4. The source gives few details on any workaround.

Written 2 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
5.8 Medium 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L CNA (mitre)
  • CISA KEV Not listed.
  • EPSS 0.0098, the 62nd percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:17 UTC First seen by agentprime
  2. 31 Oct 2026, 14:17 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.