Is This vulnerability exploited in the wild?

No. Junglewise Threat Intelligence has no report of This vulnerability being exploited in the wild.

How severe is This vulnerability?

High severity, with a CVSS score of 7.5, published 23 June 2026.

Which products and versions are affected?

github.com/traefik/traefik (Go) < 2.10.5.

Is there a fix for This vulnerability?

A patch was published on 2023-10-12: Patches released: Traefik v2.10.5 and v3.0.0-beta4 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is This vulnerability attacked?

It is attacked over the network.

Check whether you run github.com/traefik/traefik (Go) 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.

Traefik HTTP/2 denial of service via rapid stream reset

Q: Is there a fix for This vulnerability?

A patch was published on 2023-10-12: Patches released: Traefik v2.10.5 and v3.0.0-beta4 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is This vulnerability attacked?

It is attacked over the network.

Q: Am I affected?

Check whether you run github.com/traefik/traefik (Go) 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.

Severity: high · CVSS 7.5 · Published 2026-06-23

Traefik is a reverse proxy and load balancer used to route incoming traffic to backend services. A vulnerability in HTTP/2 request handling allows remote attackers to rapidly create and cancel HTTP/2 streams, exhausting server resources and rendering the service unavailable. This affects multiple Traefik installations without requiring authentication or user interaction.

Technologies: github.com/traefik/traefik (Go). Vendors: Go.

Quick answers

Is This vulnerability exploited in the wild?: No. Junglewise Threat Intelligence has no report of This vulnerability being exploited in the wild.
How severe is This vulnerability?: High severity, with a CVSS score of 7.5, published 23 June 2026.
Which products and versions are affected?: github.com/traefik/traefik (Go) < 2.10.5.
Is there a fix for This vulnerability?: A patch was published on 2023-10-12: Patches released: Traefik v2.10.5 and v3.0.0-beta4 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is This vulnerability attacked?: It is attacked over the network.
Am I affected?: Check whether you run github.com/traefik/traefik (Go) 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.

Technical details

Traefik versions before 2.10.5 and 3.0.0-beta4 inherit a denial-of-service vulnerability from the Go standard library's HTTP/2 implementation (CVE-2023-44487 / CVE-2023-39325, the "Rapid Reset" technique). The vulnerability stems from uncontrolled resource consumption (CWE-400, CWE-770) when handling rapidly created and cancelled HTTP/2 streams. A remote, unauthenticated attacker can exploit this via the network without complexity, triggering resource exhaustion and service unavailability. Patches are available in Traefik v2.10.5 and v3.0.0-beta4.

Affected products

Traefik Labs Traefik < 2.10.5, 3.0.0-beta3 and earlier

Timeline

2023-10-12: disclosed: Original advisory published as GHSA-7v4p-328v-8v5g
2023-10-12: patched: Patches released: Traefik v2.10.5 and v3.0.0-beta4

References

https://github.com/traefik/traefik/security/advisories/GHSA-7v4p-328v-8v5g

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