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Advisory record · GHSA-h4r5-mxv5-8mjc

kin-openapi deepObject query decoding repeatedly compiles an invariant regular expression

CVSS 5.3 MediumEPSS 0.0045 · 39th percentile

Published by the GitHub Advisory Database at 15 Oct 2026, 20:18 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
github.com/getkin/kin-openapiGo>=0.145.0, <0.146.00.146.0
Identifiers
GHSA-h4r5-mxv5-8mjc · CVE-2026-100350 · GO-2026-6787
Weakness (CWE)
CWE-400 · CWE-770 · CWE-1050
Tags
Published
15 Oct 2026
Updated
5 Nov 2026

Machine-written summary

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

GHSA-h4r5-mxv5-8mjc affects github.com/getkin/kin-openapi versions 0.145.0 up to but not including 0.146.0. An unauthenticated attacker who can reach an endpoint validated against a spec with a query parameter using deepObject style can send requests with many unused query keys, forcing repeated regexp compilation and consuming CPU (denial of service). Upgrade to version 0.146.0, which fixes the issue.

Written 1 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
5.3 Medium 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0045, the 39th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:12 UTC First seen by agentprime
  2. 31 Oct 2026, 14:12 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.