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Advisory record · GHSA-gj2r-phwg-6rww

Kubernetes users may update Pod labels to bypass network policy

CVSS 7.6 HighEPSS 0.0057 · 47th percentile

Published by the GitHub Advisory Database at 26 Sept 2023, 18:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
github.com/cilium/ciliumGo>=1.13.0, <1.13.7 || >=1.14.0, <1.14.2 || <1.12.141.13.7, 1.14.2, 1.12.14
Identifiers
GHSA-gj2r-phwg-6rww · BIT-cilium-2023-39347 · BIT-cilium-operator-2023-39347 · BIT-cilium-proxy-2023-39347 · BIT-hubble-2023-39347 · BIT-hubble-relay-2023-39347 · BIT-hubble-ui-2023-39347 · BIT-hubble-ui-backend-2023-39347 · CVE-2023-39347 · GO-2023-2078
Weakness (CWE)
CWE-345
Tags
Published
26 Sept 2023
Updated
10 Sept 2026

Machine-written summary

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

Cilium (Go module github.com/cilium/cilium) versions before 1.12.14, from 1.13.0 before 1.13.7, and from 1.14.0 before 1.14.2 are affected. An attacker with Kubernetes API Server access who can update pod labels can cause Cilium to apply incorrect network policies, bypassing policies that match on namespace, service account, or cluster constructs. Upgrade to 1.12.14, 1.13.7, 1.14.2, or later. As a workaround, an admission webhook can block pod label updates to the io.kubernetes.pod.namespace and io.cilium.k8s.policy.* keys.

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
7.6 High 3.1 CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:H CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0057, the 47th percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:16 UTC First seen by agentprime
  2. 31 Oct 2026, 14:16 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.