CVE-2026-44774Public exploitNetwork attack vector

Configuration takeover via permissive internal-service routing

Published May 15, 2026 · Updated May 15, 2026

Improper access control in Traefik Proxy before 2.11.46, 3.6.17, and 3.7.1 allows remote authenticated users to rewrite routing configuration. The Kubernetes Gateway provider accepts every TraefikService backend name ending in @internal, so a tenant-controlled HTTPRoute can publish the write-capable rest@internal handler despite providers.rest.insecure=false. Exploitation requires the Gateway and REST providers, a shared Gateway that accepts the tenant namespace, and permission to create or update HTTPRoute objects; successful use grants live control over routers and services.

CVSS severity6.4
Medium
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Traefik Proxy before 2.11.46, 3.6.17, and 3.7.1 allows remote authenticated users to rewrite routing configuration. The Kubernetes Gateway provider accepts every TraefikService backend name ending in @internal, so a tenant-controlled HTTPRoute can publish the write-capable rest@internal handler despite providers.rest.insecure=false. Exploitation requires the Gateway and REST providers, a shared Gateway that accepts the tenant namespace, and permission to create or update HTTPRoute objects; successful use grants live control over routers and services.

The record

CVE
CVE-2026-44774
Published
May 15, 2026
Updated
May 15, 2026
Vendor
Traefik Labs
Product
Traefik Proxy
Classifications
CWE-284, T1068
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 15, 2026CVE publishedPublication date reported by the CVE source.
  2. May 15, 2026Record 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=< 2.11.46
  2. Affected versionversion=>= 3.0.0-beta1, < 3.6.17
  3. Affected versionversion=>= 3.7.0-rc.0, < 3.7.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Traefik Labs · Traefik Proxyversion=< 2.11.46; version=>= 3.0.0-beta1, < 3.6.17; version=>= 3.7.0-rc.0, < 3.7.1

Published CVSS scores

8.3Red Hat SADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H
9.9NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
6.4GitHub CNACVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:H/SA:H

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-284Improper Access Control
T1068Exploitation for Privilege Escalation

Public exploit references

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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