Is CVE-2026-26963 in the CISA KEV catalog?

No. CVE-2026-26963 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-26963?

CVE-2026-26963 has a CVSS v3 base score of 6.1 (MEDIUM).

What is the EPSS score for CVE-2026-26963?

CVE-2026-26963 has an EPSS score of 0.13% (3th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-26963?

Upgrade cilium to 1.18.6 or later.

CVE & CISA-KEV Catalog

CVE-2026-26963

MEDIUM

6.1

CVSS v3

NVD

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.

CWE-863Incorrect Authorization

How to fix

Remediation Available

ciliumNVD

Affected:>= 1.18.0, < 1.18.6Fixed in:1.18.6CVE-2026-26963derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorAdjacent

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeChanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

0.13%probability of exploitation in 30 days

3rdpercentile

Low risk: more likely to be exploited than 3% of all known CVEs.

References

Patch2

Issue Tracking1

github.com

Release Notes1

github.com

Related Vulnerabilities

Other CWE-863 (Incorrect Authorization) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-22518	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2023-38035	Critical	9.8	100%	KEV + Ransom	-
CVE-2022-46169	Critical	9.8	100%	KEV	Fix
CVE-2025-29927	Critical	9.1	100%	-	Fix
CVE-2024-38856	Critical	9.8	99%	KEV	Fix
CVE-2020-36289	Medium	5.3	99%	-	Fix

Embed a live status badge for CVE-2026-26963

Markdown

[![CVE-2026-26963](https://tridentstack.com/cve/badge/CVE-2026-26963.svg)](https://tridentstack.com/cve/CVE-2026-26963)

HTML

<a href="https://tridentstack.com/cve/CVE-2026-26963"><img src="https://tridentstack.com/cve/badge/CVE-2026-26963.svg" alt="CVE-2026-26963"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-02-20.