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Advisory record · GHSA-jmf4-m7j9-g72r

Rancher Fleet has Unauthenticated Webhook: Regex Injection via Unsanitized Repository URL Components

CVSS 8.3 HighEPSS 0.0042 · 36th percentile

Published by the GitHub Advisory Database at 1 Jul 2026, 20:44 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
github.com/rancher/fleetGo>=0.15.0, <0.15.2 || >=0.14.0, <0.14.6 || >=0.13.0, <0.13.11 || >=0.12.0, <0.12.150.15.2, 0.14.6, 0.13.11, 0.12.15
Identifiers
GHSA-jmf4-m7j9-g72r · CVE-2026-44937 · GO-2026-5874
Weakness (CWE)
CWE-345 · CWE-918
Tags
Published
1 Jul 2026
Updated
7 Jul 2026

Machine-written summary

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

Rancher Fleet versions 0.12.0 to before 0.12.15, 0.13.0 to before 0.13.11, 0.14.0 to before 0.14.6, and 0.15.0 to before 0.15.2 are affected when the webhook endpoint is set up without a secret. An unauthenticated attacker can forge webhook requests without knowing the configured repository or path, which can trigger repeated re-cloning that uses resources and, if the attacker can read the Git repository, roll services back to older revisions. Upgrade to version 0.12.15, 0.13.11, 0.14.6, or 0.15.2 or later. If upgrading isn't possible, enable webhooks only with a shared secret.

Written 6 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
8.3 High 4.0 CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N CNA (suse)
  • CISA KEV Not listed.
  • EPSS 0.0042, the 36th percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 15:06 UTC First seen by agentprime
  2. 31 Oct 2026, 15:06 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.