CVE•Published 2026-05-08•Modified 2026-05-18•0 articles on news•5 live references•NVD data

CVE-2026-41520Cilium · Cilium

Vulnerability data via NVD (ingested)

CVSS v3.1

7.9

HIGH

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

EPSS percentile

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Weaknesses (CWE)

CWE-200Exposure of Sensitive Information to an Unauthorized Actor CWE-312Cleartext Storage of Sensitive Information

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

Published 2026-05-08

Modified 2026-05-18

External references

NVD MITRE Exploit-DB Sploitus VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common). Live host counts are a Premium feature.

Shodan · vuln tag

vuln:CVE-2026-41520

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Cilium Cilium"

All exposed Cilium Cilium instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Cilium"

HTTP body or banner mentions "Cilium" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-41520