What’s Vulnerable › Vulnerabilities

CVE-2023-54365: Traefik - Denial of Service via HTTP/2 Request Handling

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-23 · updated 2026-09-26
• Weakness: CWE-400

Description

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.

Affected products

• Go: before 1.20.10; from 1.21.0 before 1.21.3 — fixed in 1.20.10, 1.21.3
• Red Hat OpenShift AI 2.25: all versions
• Traefik: before 2.10.5; 3.0.0-beta1, 3.0.0-beta2, 3.0.0-beta3 — fixed in 2.10.5

How to fix

Upgrade to a fixed version: Go 1.20.10, 1.21.3; Traefik 2.10.5. Check the vendor advisory for mitigations.

References

• 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://access.redhat.com/security/cve/CVE-2023-54365
• https://bugzilla.redhat.com/show_bug.cgi?id=2491710
• https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-54365.json

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