9.3

CVE-2026-114656: Traefik before 2.11.58 and 3.7.13 mTLS Bypass via Negated Host Matcher

Analyzed
AliasesCGA-rgqj-fx3v-25hg
Published 22-10-2026Last modified 04-11-2026

Vulnerability summary

CVE-2026-114656 is a critical (CVSS 9.3) Interpretation Conflict vulnerability in traefik. EPSS estimates a 0.15% chance of exploitation in the next 30 days, higher than 4.6% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 6.9, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
9.3/10
010
Critical · v3.1 (NVD)
EPSS score
0.15%
0%100%
Low · Change unavailable
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
OPENSUSE-SU-2026:12281-1

Timeline

  1. 22-10-2026
    PublishedVulnerability first disclosed.
  2. 04-11-2026
    Last modifiedVulnerability information updated.

Description

Traefik before 2.11.58 and 3.7.13 contains an authentication bypass vulnerability that allows unauthenticated clients to skip client-certificate checks because negated Host matchers are counted as served domains. Attackers can reach backends protected by RequireAndVerifyClientCert when a router rule with !Host() creates a TLS options conflict that falls back to the default options.

CVSS metrics

6 scores · 4 sources · 2 versions

EPSS trend

Probability

0.15%

Chance of exploitation in the next 30 days

Percentile

5%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

22-10-202604-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Chainguard1 product
  • traefik-3.6All versions (No fix recorded)
Traefik1 product
  • traefik< 2.11.58 | ≥ 3.0.0, < 3.7.13
Wolfi1 product
  • traefik-3.6All versions (No fix recorded)

3 vendors · 3 products

References

4 links