CVE-2026-110353: 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 55% of scored CVEs
DescriptionCVE.org
HAProxy 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.
Affected products4
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- HAProxy · HAProxyfrom 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 3.2.0r1 before 3.2r1-378.1259; from 3.3.0r1 before 3.3r1-377.1005
- HAProxy · Kubernetes Ingress Controllerfrom 3.2.0 before 3.2.17
- Haproxy · 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-2026-110353 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.