CVE-2026-110354: HAProxy vulnerability
Fixed in 3.4.6 · Affected: HAProxy before 3.4.6 · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 57% of scored CVEs
DescriptionCVE.org
HAProxy 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.
Affected products4
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- HAProxy · HAProxyfrom 3.0.0 before 3.0.30; from 3.2.0 before 3.2.26; from 3.3.0 before 3.3.17; from 3.4.0 before 3.4.6; from 3.5-dev before 3.5-dev9
- HAProxy · HAProxy Enterprise Editionfrom 3.0r1 before 3.0r1-362.1441; from 3.2r1 before 3.2r1-378.1259; from 3.3r1 before 3.3r1-377.1005
- HAProxy Technologies · HAProxy Kubernetes Ingress Controllerfrom 3.2.0 before 3.2.17
- HAProxy Technologies · Kubernetes Ingress Controller Enterprisefrom 3.2.0 before 3.2.17-ee1; from 3.0 before 3.0.16-ee17; from 1.11 before 1.11.14-ee11
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- HAProxy
- Published
- October 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-110354 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.