Traefik before v2.11.58 and v3.7.14 contains an authentication bypass vulnerability in its SNI check, which is skipped when request TLS state is nil. Unauthenticated clients can send HTTP/2 requests with the :scheme http pseudo-header over TLS on Go 1.27 builds to reach routers requiring client certificates without presenting one.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements Present

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact High

Subsequent System Integrity Impact High

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Changed

Confidentiality Impact High

Integrity Impact High

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
traefik traefik unaffected
Version Status Constraints
0 affected < 2.11.58
2.11.58 unaffected —
traefik traefik unaffected
Version Status Constraints
3.0.0 affected < 3.7.14
3.7.14 unaffected —

No data.

No data.

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Project Subscriptions

Vendors Products
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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/traefik/traefik/security/advisories/GHSA-fh26-gfpp-7xxx cve-icon cve-icon
https://www.vulncheck.com/advisories/traefik-before-2.11.58-and-3.7.14-sni-check-bypass-via-http-2-scheme cve-icon cve-icon
History

Thu, 22 Oct 2026 02:00:00 +0000

Type Values Removed Values Added
Description Traefik before v2.11.58 and v3.7.14 contains an authentication bypass vulnerability in its SNI check, which is skipped when request TLS state is nil. Unauthenticated clients can send HTTP/2 requests with the :scheme http pseudo-header over TLS on Go 1.27 builds to reach routers requiring client certificates without presenting one.
Title Traefik before v2.11.58 and v3.7.14 SNI Check Bypass via HTTP/2 Scheme
First Time appeared Traefik
Traefik traefik
Weaknesses CWE-288
CPEs cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:*
Vendors & Products Traefik
Traefik traefik
References
Metrics cvssV3_1

{'score': 8.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N'}

cvssV4_0

{'score': 7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-22T01:43:36.508Z

Reserved: 2026-10-21T21:57:36.197Z

Link: CVE-2026-114635

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-22T02:16:56.140

Modified: 2026-10-22T02:16:56.140

Link: CVE-2026-114635

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-22T06:30:17Z

Weaknesses