---
title: "CVE-2026-88009: Traefik - Authorization Bypass"
description: "Traefik < 2.11.57 and < 3.7.13 contains a cross-vhost routing bypass caused by accepting rootless HTTP/1 request targets stored in URL.Opaque but forwarding them verbatim to backend, letting attackers bypass path-scoped authorization and access logging, exploit requires crafted HTTP/1 requests."
url: https://panop.io/threat-heartbeat/CVE-2026-88009/
---

# CVE-2026-88009 Traefik - Authorization Bypass

Traefik < 2.11.57 and < 3.7.13 contains a cross-vhost routing bypass caused by accepting rootless HTTP/1 request targets stored in URL.Opaque but forwarding them verbatim to backend, letting attackers bypass path-scoped authorization and access logging, exploit requires crafted HTTP/1 requests.

CVSS base score 8.2 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.44% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-88009)

## Details

Type

Authorization Bypass

Impact

Broken Access Control, Information Disclosure

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

Published

10 September 2026

Updated

15 October 2026

Weakness

[CWE-444](https://cwe.mitre.org/data/definitions/444.html)

## Vendor fix

Update to versions 2.11.57 or 3.7.13 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-88009](https://nvd.nist.gov/vuln/detail/CVE-2026-88009)
- [https://github.com/traefik/traefik/releases/tag/v2.11.57](https://github.com/traefik/traefik/releases/tag/v2.11.57)
- [https://github.com/traefik/traefik/releases/tag/v3.7.13](https://github.com/traefik/traefik/releases/tag/v3.7.13)
- [https://github.com/traefik/traefik/security/advisories/GHSA-f52w-8j3h-j724](https://github.com/traefik/traefik/security/advisories/GHSA-f52w-8j3h-j724)
- [https://github.com/traefik/traefik/commit/58d1e9ca204526823211e30fd4634101c59d58e9](https://github.com/traefik/traefik/commit/58d1e9ca204526823211e30fd4634101c59d58e9)
- [https://github.com/traefik/traefik/pull/13796](https://github.com/traefik/traefik/pull/13796)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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