CVE-2022-46153Network attack vector

mTLS bypass via invalid TLSOption fail-open

Published Dec 8, 2022 · Updated Apr 23, 2025

Improper certificate validation in Traefik Proxy before 2.9.6 allows remote attackers to access mTLS-protected routes without a client certificate. The router manager built HTTP and TCP handlers after TLSOption construction failed, leaving the referenced route with an empty TLS configuration instead of rejecting it. Exposure requires an invalid TLSOption, such as RequireAndVerifyClientCert without a valid CA file, and permits unauthorized reading or modification of data served by the affected route.

CVSS severity8.1
High
EPSS probability0.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper certificate validation in Traefik Proxy before 2.9.6 allows remote attackers to access mTLS-protected routes without a client certificate. The router manager built HTTP and TCP handlers after TLSOption construction failed, leaving the referenced route with an empty TLS configuration instead of rejecting it. Exposure requires an invalid TLSOption, such as RequireAndVerifyClientCert without a valid CA file, and permits unauthorized reading or modification of data served by the affected route.

The record

CVE
CVE-2022-46153
Published
Dec 8, 2022
Updated
Apr 23, 2025
Vendor
Traefik Labs
Product
Traefik Proxy
Classifications
CWE-295, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 8, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.9.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Traefik Labs · Traefik Proxyversion=< 2.9.6

Published CVSS scores

8.1GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-295Improper Certificate Validation
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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