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TI-2026-30103 Aliases CVE-2026-41520GHSA-gj49-89wh-h4gj

Cillium exposes sensitive information included in the cilium-bugtool debug archive

Priority LOW 35CWE-200Published · Updated

Key facts

Attack vector
Local
Privileges required
High
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-200.

Summary

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Prior to versions 1.17.15, 1.18.9, and 1.19.3, the output of cilium-bugtool can contain sensitive data when the tool is run against Cilium deployments with WireGuard encryption enabled. This issue has been patched in versions 1.17.15, 1.18.9, and 1.19.3.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00077 0th percentileScored 2026-11-07
Fix Fixed cilium (cilium): 1.17.15, 1.18.9, 1.19.3github.com/cilium/cilium (Go): 1.17.15, 1.18.9, 1.19.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ciliumciliumbefore 1.17.15; 1.18.0 to before 1.18.9; 1.19.0 to before 1.19.31.17.15, 1.18.9, 1.19.3Patch availableCNA
—github.com/cilium/cilium (Go)before 1.17.151.17.15Patch availableGHSA-gj49-89wh-h4gj
—github.com/cilium/cilium (Go)1.18.0 to before 1.18.91.18.9Patch availableGHSA-gj49-89wh-h4gj
—github.com/cilium/cilium (Go)1.19.0 to before 1.19.31.19.3Patch availableGHSA-gj49-89wh-h4gj
  • cilium Vendorcilium Affected before 1.17.15; 1.18.0 to before 1.18.9; 1.19.0 to before 1.19.3 Fixed in 1.17.15, 1.18.9, 1.19.3 Patch available CNA
  • github.com/cilium/cilium (Go) Vendor— Affected before 1.17.15 Fixed in 1.17.15 Patch available GHSA-gj49-89wh-h4gj
  • github.com/cilium/cilium (Go) Vendor— Affected 1.18.0 to before 1.18.9 Fixed in 1.18.9 Patch available GHSA-gj49-89wh-h4gj
  • github.com/cilium/cilium (Go) Vendor— Affected 1.19.0 to before 1.19.3 Fixed in 1.19.3 Patch available GHSA-gj49-89wh-h4gj

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:cilium:cilium:*:*:*:*:*:*:*:*before 1.17.15; 1.18.0 to before 1.18.9; 1.19.0 to before 1.19.3Vulnerablecilium
  • cpe:2.3:a:cilium:cilium:*:*:*:*:*:*:*:* Versions before 1.17.15; 1.18.0 to before 1.18.9; 1.19.0 to before 1.19.3 Vulnerable ·cilium

Remediation

  • Fix · CNA cilium (cilium) Fixed in 1.17.15, 1.18.9, 1.19.3
  • Fix · GHSA-gj49-89wh-h4gj github.com/cilium/cilium (Go) Fixed in 1.17.15 Advisory →
  • Fix · GHSA-gj49-89wh-h4gj github.com/cilium/cilium (Go) Fixed in 1.18.9 Advisory →
  • Fix · GHSA-gj49-89wh-h4gj github.com/cilium/cilium (Go) Fixed in 1.19.3 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-41520
  2. 2026-10-03 Alias added: GHSA-gj49-89wh-h4gj

References

Advisory 2

Other 5

  • TI-2024-32092 CIDR deny policies may not take effect when a more narrow CIDR allow is present CVSS 3.1HIGH 8.7
  • TI-2023-12305 Cilium eBPF filters may be temporarily removed during agent restart CVSS 3.1CRITICAL 9.8
  • TI-2023-20486 Cilium NetworkPolicy bypass via pod labels CVSS 3.1CRITICAL 9.0
  • TI-2022-11721 Incorrect Default Permissions in Cilium CVSS 3.1HIGH 8.8
  • TI-2026-36600 Cilium: Sensitive information disclosure and cluster disruption via local Envoy admin socket access CVSS 3.1CRITICAL 9.2
  • TI-2026-40915 Cilium: Namespaced HTTPRoutes can redirect traffic to other namespaces CVSS 3.1HIGH 8.9
See all 34 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences