CVE-2026-56742

highPriorität · verfolgen · 36OT-Risiko · erhöhtEPSS 0.002 · 7. PerzentilEUUS
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
0.18% (7th) EPSS
CVSS 8.9 · high
Is it mine?
19 products
Prüfe deine Angriffsfläche
Who says so?
4 sources
cnnvd · enisa_euvd · osv · nvd

EPSS · bewertet 2026-10-27

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.

01

cvss

Technischer Schweregrad, 0–10. Eine Zeile je Quelle.

8.9
010

Basiswert 0–10 · höher = schwerwiegender · Vektor überfahren zum Auflösen⚠ Quellen uneinig · medium–high · 5.9–8.9

v3.18.9highCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:Lprimary · NVD / NIST USAusnutzbarkeit 2.3 · Auswirkung 6
v3.15.9mediumCVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:Lsecondary · ENISA EU
v3.15.9mediumCVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:Lsecondary · security-advisories@github.comAusnutzbarkeit 1.7 · Auswirkung 3.7
v3.15.9mediumCVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:Lsecondary · OSV
v3.18.1highCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L/E:Usecondary · CVSS-BT (t0sche)
02

SSVC

Eine Handlungsentscheidung — aus Ausnutzung und Auswirkung.

Trackcoordinatorcisa_ssvcUS
03

schwächen

Die CWE-Schwächeklassen, zu denen dies gehört.

CWE-862USCWE-862US
04

betroffene Produkte (19)

Betroffene Produkte und Versionsbereiche.

05

Advisories (5)

Hersteller- und Ökosystem-Meldungen dazu.

  • GHSA-w7c2-w76w-5hmjCilium: Namespaced HTTPRoutes can redirect traffic to other namespaces2026-09-24ghsa · osvUS

    ### Impact In Cilium clusters using [Gateway API](https://docs.cilium.io/en/stable/network/servicemesh/gateway-api/gateway-api/), users with permissions to create or update namespaced HTTPRoutes can mirror HTTP traffic to any Service in any namespace, bypassing the ReferenceGrant authorization mechanism. Gateway API functionality is disabled by default. ### Patches This issue affects: * Cilium v1.19 from v1.19.0 to v1.19.4 inclusive * Cilium v1.18 from v1.18.0 to v1.18.10 inclusive * All versions of Cilium before v1.17.17 This issue is patched in: * Cilium v1.19.5 * Cilium v1.18.11 * Cilium v1.17.17 ### Workarounds There is no workaround to this issue. Users of this feature who are unable to upgrade can mitigate the risk by ensuring that RBAC permissions to create `HTTPRoute` objects are only granted to cluster admins. ### Acknowledgements The Cilium community has worked together with members of Isovalent to prepare these mitigations. Special thanks to @galanko for reporting the issue and @mhofstetter for their work on triaging and remediating this issue. ### For more information If you have any questions or comments about this advisory, please reach out on [Slack](https://docs.cilium.io/en/latest/community/community/). If you think you have found a vulnerability affecting Cilium, we strongly encourage you to report it to our security mailing list at [security@cilium.io](mailto:security@cilium.io). This is a private mailing list for the Cilium security team, and your report will be treated as top priority.

  • BIT-cilium-2026-56742Cilium: Namespaced HTTPRoutes can redirect traffic to other namespaces2026-07-19vendor · osvUS

    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.

  • BIT-cilium-operator-2026-56742Cilium: Namespaced HTTPRoutes can redirect traffic to other namespaces2026-07-19vendor · osvUS

    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.

  • BIT-hubble-relay-2026-56742Cilium: Namespaced HTTPRoutes can redirect traffic to other namespaces2026-07-19vendor · osvUS

    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.

  • GO-2026-6596Cilium: Namespaced HTTPRoutes can redirect traffic to other namespaces in github.com/cilium/cilium2026-10-01vendor · osvUS

    Cilium: Namespaced HTTPRoutes can redirect traffic to other namespaces in github.com/cilium/cilium

06

auch bekannt als (7)

Weitere Namen und Kennungen dieser Entität.

07

quellen

Welche Quellen diesen Datensatz belegen und wann.

cnnvdenisa_euvdosvnvdNVDCVE.orgMITRE
veröffentlicht 2026-07-15geändert 2026-07-17
08

Referenzen (25)

Externe Belege — Patches, Meldungen, Analysen.

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