CVE-2026-41520Cillium exposes sensitive information included in the cilium-bugtool debug archive
- 7.9HighCVSS base score
- 0.08%Exploitation in 30 daysEPSS · top 100% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By GitHub_M
- 18 days later
· 18 days later
Published
- 5 days later
· 5 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | High7.9 | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N |
| NVDNVD · Analyzed | 3.1 | Medium4.4 | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N |
- EPSS (exploitation in 30 days)
- 0.08% · top 100% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.9.
Affected products
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Gogithub.com/cilium/ciliumGHSA-gj49-89wh-h4gj (opens in a new tab)
References
References4
- https://github.com/cilium/cilium/security/advisories/GHSA-gj49-89wh-h4gj (opens in a new tab)x_refsource_CONFIRM
- https://github.com/cilium/cilium/releases/tag/v1.17.15 (opens in a new tab)x_refsource_MISC
- https://github.com/cilium/cilium/releases/tag/v1.18.9 (opens in a new tab)x_refsource_MISC
- https://github.com/cilium/cilium/releases/tag/v1.19.3 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-28845 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-gj49-89wh-h4gj (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-41520)Record last updated .