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Advisory record · GHSA-7774-7vr3-cc8j

Authorization Policy Bypass Due to Case Insensitive Host Comparison

CVSS 8.3 HighEPSS 0.012 · 69th percentile

Published by the GitHub Advisory Database at 30 Aug 2021, 16:15 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
istio.io/istioGo<1.9.8 || >=1.10.0, <1.10.4 || >=1.11.0, <1.11.11.9.8, 1.10.4, 1.11.1
Identifiers
GHSA-7774-7vr3-cc8j · CVE-2021-39155
Weakness (CWE)
CWE-178
Tags
Published
30 Aug 2021
Updated
10 Sept 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 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.012, the 69th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:45 UTC First seen by agentprime
  2. 31 Oct 2026, 14:45 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.