CVE-2023-54365

Traefik before 2.10.5 and 3.0.0-beta4 is affected by a denial-of-service vulnerability in HTTP/2 request handling inherited from the Go standard library's HTTP/2 implementation (CVE-2023-44487 / CVE-2023-39325, the 'Rapid Reset' technique). A remote attacker can rapidly create and cancel HTTP/2 streams to exhaust server resources and cause service unavailability.

What this means for your business

It affects Traefik. It matters if your company, or a supplier that handles your data, runs it.
An attacker can use it remotely, over a network, without a login, and without anyone at your company clicking anything.
FIRST's prediction model gives it a 0.8% chance of attack attempts being seen in the next 30 days, ranking above 53% of all known flaws.

What to do

1Check whether your company or your suppliers run Traefik, and which version. The affected versions are listed further down this page.
2If you do, apply the vendor's fix. A patch or vendor advisory has been published.

Not sure if your company is exposed?

Fastnexa’s certified penetration testers can check whether attackers could use this flaw, or others like it, against your websites, apps and network. The full test is free for our first 10 founding clients until 31 December 2026.

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Scoring

CVSS: 7.5 (v3.1)
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4: 8.7
Weakness: CWE-400
Assigned by: disclosure@vulncheck.com

Dates

Published: 2026-06-23
Last modified: 2026-09-26
Sources: NVD

Affected products

Traefik Traefik- 2.10.5, 3.0.0
Golang Go- 1.20.10, 1.21.0 - 1.21.3
Redhat Openshift Aiall versions

As listed in the NVD configuration data. Not a statement about your estate.