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© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2026-41520

22
FAUCET Score

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.

First published: May 8, 2026Last modified: May 8, 2026

Impacted Technologies

VendorProductVersion(s)CPE
< 1.17.15CPE matchmatch criteria
cpe:2.3:a:cilium:cilium:*:*:*:*:*:*:*:*
>= 1.18.0, < 1.18.9CPE matchmatch criteria
cpe:2.3:a:cilium:cilium:*:*:*:*:*:*:*:*
>= 1.19.0, < 1.19.3CPE matchmatch criteria
cpe:2.3:a:cilium:cilium:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.9HIGH

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
1.5
Impact Score
5.8
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.08%
Probability of exploitation in next 30 days
EPSS Percentile
0.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0008 is in the 1st percentile among its peer group of 3,720 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

gopatch availablevia ghsa
Product: github.com/cilium/ciliumFixed in: 1.17.15
gopatch availablevia ghsa
Product: github.com/cilium/ciliumFixed in: 1.18.9
gopatch availablevia ghsa
Product: github.com/cilium/ciliumFixed in: 1.19.3
github_advisoryworkaround availablevia nvd_reference
View patch

Vendor Advisories (1)

goGHSA-gj49-89wh-h4gjhigh

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

Apr 25, 2026

References

github.com / cilium/cilium/releases/tag/v1.17.15
ProductRelease Notes
github.com / cilium/cilium/releases/tag/v1.18.9
ProductRelease Notes
github.com / cilium/cilium/releases/tag/v1.19.3
ProductRelease Notes
github.com / cilium/cilium/security/advisories/GHSA-gj49-89wh-h4gj
MitigationVendor Advisory