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CVE-2026-114635

Traefik before v2.11.58 and v3.7.14 SNI Check Bypass via HTTP/2 Scheme

HIGH
8.7
CVSS Score
Published: October 22, 2026 at 01:43 AM UTC
Updated: October 22, 2026 at 03:39 PM UTC
1 product affected across 1 vendorTraefik

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Severity
HIGH8.7
Exploit prediction
EPSS 0.2%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Traefik· Traefik
90%
3.0.0
Vendor states this is fixed in 2.11.58 (unaffected)
Vendor states this is fixed in 3.7.14 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Vendor Advisory
Source: cverecord
https://github.com/traefik/traefik/security/advisories/GHSA-fh26-gfpp-7xxx
Third Party Advisory
Source: cverecord
https://www.vulncheck.com/advisories/traefik-before-2.11.58-and-3.7.14-sni-check-bypass-via-http-2-scheme

CVSS

8.7HIGHVulnCheck
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusUNDERGOING ANALYSIS
CWE
CWE-288

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