CVE-2026-110353

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-110353
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-22 03:16:31 UTC
Updated2026-10-22 03:16:31 UTC
DescriptionHAProxy 3.2 before 3.4.6 allows a remote unauthenticated attacker to cause a denial of service (worker-thread CPU exhaustion) via a truncated HTTP/2 PING frame. h2c_handle_ping in src/mux_h2.c does not check for a short read, unlike the other H2 frame handlers. Because the incomplete frame cannot be processed, its data is never consumed, and the H2 multiplexer tasklet is repeatedly woken by that pending data without making progress. The CPU spins until timeout http-request closes the connection, and an attacker opening many such connections can sustain high CPU usage.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem Types: CWE-252 | CWE-252 CWE-252 Unchecked Return Value

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNACVSS7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA HAProxy HAProxy affected 3.2.0 3.2.26 custom Not specified
CNA HAProxy HAProxy affected 3.3.0 3.3.17 custom Not specified
CNA HAProxy HAProxy affected 3.4.0 3.4.6 custom Not specified
CNA HAProxy HAProxy affected 3.5-dev 3.5-dev9 custom Not specified
CNA HAProxy HAProxy Enterprise Edition affected 3.2.0r1 3.2r1-378.1259 custom Not specified
CNA HAProxy HAProxy Enterprise Edition affected 3.3.0r1 3.3r1-377.1005 custom Not specified
CNA HAProxy Kubernetes Ingress Controller affected 3.2.0 3.2.17 custom Not specified
CNA Haproxy Kubernetes Ingress Controller Enterprise affected 3.2.0 3.2.17-ee1 custom Not specified
CNA Haproxy Kubernetes Ingress Controller Enterprise affected 3.0 3.0.16-ee17 custom Not specified
CNA Haproxy Kubernetes Ingress Controller Enterprise affected 1.11 1.11.14-ee11 custom Not specified

References

ReferenceSourceLinkTags
git.haproxy.org [email protected] git.haproxy.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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