CVE-2026-26963 | BDVDB-2026-316331 Detail

ciliumcilium

Description#

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Versions 1.18.0 through 1.18.5 will incorrectly permit traffic from Pods on other nodes when Native Routing, WireGuard and Node Encryption are enabled. This issue has been fixed in version 1.18.6.

Impact#

Per CVSS v3.1: confidentiality impact low, integrity impact low, availability impact none. Attack vector: adjacent.

Weaknesses#

CWE-863 Incorrect Authorization

References#

Exploit#

No public exploit known

History#

Version 12026-02-19Record published in the CVE List.
Version 22026-02-20Most recent update recorded in the CVE List.

Published

Published: 2026-02-19
Last modified: 2026-02-20

Vendor information

Vendor: cilium
Product: cilium

All cilium vulnerabilities

Score

6.1 Medium

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 3.4.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Incorrect Authorization

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
>= 1.18.0, < 1.18.6
Fixed
Not stated

Scoring System

CVSS v4.0

Not available

CVSS v3.1

6.1 Medium

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

Metric breakdown
Attack Vector	Adjacent
Attack Complexity	Low
Privileges Required	None
User Interaction	None
Scope	Changed
Confidentiality	Low
Integrity	Low
Availability	None

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).