CVE-2026-110354: haproxy technologies haproxy kubernetes ingress controller Infinite Loop
Vulnerability summary
CVE-2026-110354 is a high (CVSS 7.5) Infinite Loop vulnerability in haproxy technologies haproxy kubernetes ingress controller. EPSS estimates a 0.76% chance of exploitation in the next 30 days, higher than 54.8% of scored vulnerabilities.
Timeline
- 22-10-2026PublishedVulnerability first disclosed.
Description
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.
CVSS metrics
2 scores · 2 sources · 1 version- NVDNIST7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.76%
Chance of exploitation in the next 30 days
Percentile
55%
Versus all other CVEs
30-day change
Change unavailable
Change unavailable
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Haproxy2 products
- haproxy≥ 3.0.0, < 3.0.30 | ≥ 3.2.0, < 3.2.26 | ≥ 3.3.0, < 3.3.17 | ≥ 3.4.0, < 3.4.6 | ≥ 3.5-dev, < 3.5-dev9
- haproxy enterprise edition≥ 3.0r1, < 3.0r1-362.1441 | ≥ 3.2r1, < 3.2r1-378.1259 | ≥ 3.3r1, < 3.3r1-377.1005
Haproxy technologies2 products
- haproxy kubernetes ingress controller≥ 3.2.0, < 3.2.17
- kubernetes ingress controller enterprise≥ 3.2.0, < 3.2.17-ee1 | ≥ 3.0, < 3.0.16-ee17 | ≥ 1.11, < 1.11.14-ee11
2 vendors · 4 products