CVE-2023-54365

Traefik - Denial of Service via HTTP/2 Request Handling

HIGH
7.5
CVSS Score
Published: June 23, 2026 at 12:12 PM UTC
Updated: September 26, 2026 at 11:27 PM UTC
3 products affected across 3 vendorsOpenShift AIGoTraefik

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Severity
HIGH7.5
Exploit prediction
EPSS 0.8%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 1.20.101.21.0 ≤ v < 1.21.3
Affected range stops below 1.20.10, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.21.3, so it looks safe — our inference, not a vendor statement
All versions
v < 2.10.53.0.0-beta1 ≤ v < 3.0.0-beta43.0.0 beta13.0.0 beta23.0.0 beta33.0.0-beta1
Vendor states this is fixed in 2.10.5 (unaffected)
Vendor states this is fixed in 3.0.0-beta4 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (5)

Third Party Advisory
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://access.redhat.com/security/cve/CVE-2023-54365
Third Party Advisory
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://bugzilla.redhat.com/show_bug.cgi?id=2491710
Third Party Advisory
Source: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-54365.json

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHVulnCheck
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-400CWE-770

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