CVE-2026-110354

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-110354
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 before 3.4.6 allows a remote unauthenticated attacker to cause a denial of service (persistent worker-thread CPU exhaustion) via an HTTP/1.1 chunked request. Although the H1 multiplexer drains the request before closing the stream, the parser repeatedly re-processes the same bytes without making progress. The affected thread stays busy at 100% CPU after timeouts expire and after the client disconnects, and repeated requests can consume all worker threads until the process is restarted.

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-835 | CWE-835 CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')

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 3.0.0 3.0.30 custom Not specified
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 3.0r1 3.0r1-362.1441 custom Not specified
CNA HAProxy HAProxy Enterprise Edition affected 3.2r1 3.2r1-378.1259 custom Not specified
CNA HAProxy HAProxy Enterprise Edition affected 3.3r1 3.3r1-377.1005 custom Not specified
CNA HAProxy Technologies HAProxy Kubernetes Ingress Controller affected 3.2.0 3.2.17 custom Not specified
CNA HAProxy Technologies Kubernetes Ingress Controller Enterprise affected 3.2.0 3.2.17-ee1 custom Not specified
CNA HAProxy Technologies Kubernetes Ingress Controller Enterprise affected 3.0 3.0.16-ee17 custom Not specified
CNA HAProxy Technologies 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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