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Advisory record · GHSA-f94q-w3w8-cj67

Capsule: hostnameRegexHandler.OnUpdate validates stale (old) Tenant regex, allowing invalid AllowedHostnames regex to bypass webhook validation

CVSS 6.8 MediumEPSS 0.0059 · 48th percentile

Published by the GitHub Advisory Database at 18 Sept 2026, 17:14 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
github.com/projectcapsule/capsuleGo>=0.13.0, <0.13.70.13.7
Identifiers
GHSA-f94q-w3w8-cj67 · CVE-2026-61795 · GO-2026-6519
Weakness (CWE)
CWE-697
Tags
Published
18 Sept 2026
Updated
28 Sept 2026

Machine-written summary

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

Capsule versions 0.13.0 before 0.13.7 are affected. A parameter order bug in the hostname regex webhook validates the old Tenant regex instead of the new one, so an invalid AllowedHostnames regex can be saved to a Tenant. An attacker needs to be a Cluster Admin or hold a compromised admin account. Once saved, all Ingress creates and updates in that tenant are rejected until the Tenant spec is corrected. Upgrade to Capsule 0.13.7.

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
6.8 Medium 3.1 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0059, the 48th 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.