# CVE-2023-54365: Traefik denial of service via HTTP/2 Rapid Reset

Source: https://junglewise.ai/threats/cve-2023-54365-traefik-denial-of-service-via-http-2-rapid-reset  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-23. Updated: 2026-06-23  
License: CC BY 4.0 with a link back

CVE-2023-54365 · Severity: high · CVSS 7.5 · Published 2026-06-23

Traefik, a popular open-source edge router and load balancer, is vulnerable to a denial-of-service attack. By exploiting a flaw in how the system handles specific web traffic (HTTP/2), an attacker can overwhelm the server, causing it to crash or become unresponsive to legitimate users. This can lead to significant service outages and business disruption.

Technologies: [github.com/traefik/traefik (Go)](https://junglewise.ai/threats/technologies/github-com-traefik-traefik), [Traefik Labs Traefik Proxy](https://junglewise.ai/threats/technologies/traefik-proxy). Vendors: [Go](https://junglewise.ai/threats/vendors/go), [Traefik Labs](https://junglewise.ai/threats/vendors/traefik-labs).

## Quick answers

**Is CVE-2023-54365 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2023-54365 being exploited in the wild.

**How severe is CVE-2023-54365?** High severity, with a CVSS score of 7.5, published 23 June 2026.

**Which products and versions are affected?** github.com/traefik/traefik (Go) SEMVER:introduced=0,fixed=2.10.5; Traefik Labs Traefik Proxy < 2.10.5, 3.0.0-beta1 to < 3.0.0-beta4.

**Is there a fix for CVE-2023-54365?** Yes. github.com/traefik/traefik (Go): upgrade to 2.10.5 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2023-54365 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2023-54365?** Check whether you run github.com/traefik/traefik (Go) or Traefik Labs Traefik Proxy at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- github.com/traefik/traefik (Go): upgrade to 2.10.5 or later

  ```sh
  go get github.com/traefik/traefik@v2.10.5
  ```


## Technical details

Traefik is affected by a denial-of-service vulnerability inherited from the Go standard library's HTTP/2 implementation, specifically related to the 'Rapid Reset' technique (CVE-2023-44487). The vulnerability exists in the handling of HTTP/2 streams where a remote, unauthenticated attacker can rapidly create and cancel streams. This behavior bypasses standard concurrent stream limits, leading to uncontrolled resource consumption (CWE-400) on the server. An attacker can exploit this over the network to exhaust CPU and memory resources, resulting in a denial-of-service condition. The issue is resolved in Traefik versions 2.10.5 and 3.0.0-beta4.

## Affected products

- Traefik Traefik < 2.10.5, 3.0.0-beta1 to < 3.0.0-beta4

## Identifiers

- CVE-2023-54365
- GHSA-7v4p-328v-8v5g

## Timeline

- 2023-10-12: advisory: GitHub Security Advisory published
- 2026-06-23: disclosed: NVD publication date

## References

- [https://github.com/traefik/traefik/security/advisories/GHSA-7v4p-328v-8v5g](https://github.com/traefik/traefik/security/advisories/GHSA-7v4p-328v-8v5g)
- [https://www.vulncheck.com/advisories/traefik-denial-of-service-via-http-2-request-handling](https://www.vulncheck.com/advisories/traefik-denial-of-service-via-http-2-request-handling)

## Related threats

- [Traefik BasicAuth singleflight username enumeration via timing oracle](https://junglewise.ai/threats/cve-2026-88010-traefik-basicauth-singleflight-username-enumeration-via-timing)
- [Traefik readTimeout not enforced on HTTP/3 connections](https://junglewise.ai/threats/cve-2026-88012-traefik-readtimeout-not-enforced-on-http-3-connections)
- [Traefik ForwardAuth identity spoofing via header alias](https://junglewise.ai/threats/cve-2026-88011-traefik-forwardauth-identity-spoofing-via-header-alias)
- [Traefik rootless HTTP/1 request-target routing bypass](https://junglewise.ai/threats/cve-2026-88009-traefik-rootless-http-1-request-target-routing-bypass)
- [Traefik HTTP request smuggling via unrestricted protocol upgrade](https://junglewise.ai/threats/cve-2026-88008-traefik-http-request-smuggling-via-unrestricted-protocol-upgrade)