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High 7.5Published Nov 19, 2025
CVE-2025-11230Inefficient algorithm complexity in mjson in HAProxy allows remote attackers to cause a denial of service via specially crafted JSON requests.
Updated under an hour ago ()
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It affects haproxy aloha_appliance and 3 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Inefficient algorithm complexity in mjson in HAProxy allows remote attackers to cause a denial of service via specially crafted JSON requests.
- CVSS
- 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-407
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Oct 18, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
haproxy aloha_appliance haproxy:aloha_appliance | from 14.5.0 before 14.5.33; from 15.5.0 before 15.5.28; from 16.5.0 before 16.5.19; from 17.0.0 before 17.0.7 | NVD |
haproxy haproxy haproxy:haproxy | from 2.4.0 before 2.4.30; from 2.6.0 before 2.6.23; from 2.8.0 before 2.8.16; from 3.0.0 before 3.0.12; from 3.1.0 before 3.1.9; from 3.2.0 before 3.2.6 | NVD |
haproxy haproxy_enterprise haproxy:haproxy_enterprise | 2.4r1; 2.4r1; 2.4r1; 2.4r1; 2.4r1; 2.4r1; 2.4r1; 2.4r1; and 178 more ranges | NVD |
haproxy kubernetes_ingress_controller haproxy:kubernetes_ingress_controller | before 1.9.14-ee7; before 3.1.12; from 1.10.10-ee1 before 1.11.12-ee10; from 3.0.0-ee1 before 3.0.15-ee4 | NVD |
References
- https://www.haproxy.com/blog/october-2025-cve-2025-11230-haproxy-mjson-library-denial-of-service-vulnerabilityvendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.