CVE-2026-56742GHSA-W7C2-W76W-5HMJBIT-CILIUM-2026-56742BIT-CILIUM-OPERATOR-2026-56742BIT-HUBBLE-RELAY-2026-56742GO-2026-6596
Cilium: Namespaced HTTPRoutes can redirect traffic to other namespaces
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 1.17.17, 1.18.11, 1.19.5
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: none
- Automatable: no
- Technical impact: partial
Summary
Cilium is a networking, observability, and security solution. Prior to 1.17.17, 1.18.11, and 1.19.5, Cilium clusters using Gateway API allow users with permissions to create or update namespaced HTTPRoutes to mirror HTTP traffic to any Service in any namespace, bypassing the ReferenceGrant authorization mechanism. Gateway API functionality is disabled by default. This issue is fixed in versions 1.17.17, 1.18.11, and 1.19.5.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- cilium cilium
fixed in 1.17.17; From 1.18.0 · fixed in 1.18.11; From 1.19.0 · fixed in 1.19.5
- github.com/cilium/ciliumGo
fixed in 1.17.17
- github.com/cilium/ciliumCiliumGo
From 1.18.0 · fixed in 1.18.11
- github.com/cilium/ciliumGo
From 1.19.0 · fixed in 1.19.5
- github.com/cilium/ciliumGo
fixed in 1.17.17; From 1.18.0 · fixed in 1.18.11; From 1.19.0 · fixed in 1.19.5