CVE-2025-11230 | Denial of service vulnerability in HAProxy mjson library

Inefficient algorithm complexity in mjson in HAProxy allows remote attackers to cause a denial of service via specially crafted JSON requests.

Published: 2025-11-19 Last update: 2025-12-19 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-11230 is rated Moderate Risk (52.6/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.47%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-11230

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-04-29 0.41% 0.47% +0.06%
2 2026-03-21 0.27% 0.41% +0.14%
3 2026-03-01 — 0.27% —

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-11230

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]

Weakness enumeration for CVE-2025-11230

OS Trackers for CVE-2025-11230

vendor priority summary link
alpine — CVE-2025-11230: 1 source package rows (haproxy); 30 state rows across 5 repos (3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 0, open 30. https://security.alpinelinux.org/vuln/CVE-2025-11230
debian unimportant CVE-2025-11230 unimportant priority: Debian including 1 source packages (haproxy), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2025-11230
redhat high — https://access.redhat.com/security/cve/CVE-2025-11230
suse medium — https://www.suse.com/security/cve/CVE-2025-11230/
ubuntu medium CVE-2025-11230 medium priority: Ubuntu including 1 source packages (haproxy), 7 status rows across 7 suites (bionic, focal, jammy, noble, plucky, upstream, xenial): not-affected 3, released 3, needs-triage 1. https://ubuntu.com/security/CVE-2025-11230

Affected software / configurations for CVE-2025-11230

Vendor Product Version Raw CPE
haproxy aloha_appliance >= 14.5.0, < 14.5.33 cpe:2.3:a:haproxy:aloha_appliance:*:*:*:*:*:*:*:*
haproxy aloha_appliance >= 15.5.0, < 15.5.28 cpe:2.3:a:haproxy:aloha_appliance:*:*:*:*:*:*:*:*
haproxy aloha_appliance >= 16.5.0, < 16.5.19 cpe:2.3:a:haproxy:aloha_appliance:*:*:*:*:*:*:*:*
haproxy aloha_appliance >= 17.0.0, < 17.0.7 cpe:2.3:a:haproxy:aloha_appliance:*:*:*:*:*:*:*:*
haproxy haproxy >= 2.4.0, < 2.4.30 cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:*
haproxy haproxy >= 2.6.0, < 2.6.23 cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:*
haproxy haproxy >= 2.8.0, < 2.8.16 cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:*
haproxy haproxy >= 3.0.0, < 3.0.12 cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:*
haproxy haproxy >= 3.1.0, < 3.1.9 cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:*
haproxy haproxy >= 3.2.0, < 3.2.6 cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-253.271:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-254.271:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-259.342:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-263.343:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-264.356:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-268.356:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-268.373:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-268.459:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-268.464:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-268.477:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-268.499:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-268.553:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-268.560:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-268.564:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-268.596:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-269.596:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-269.599:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-270.616:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-271.673:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-271.677:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-272.683:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-272.686:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-272.728:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-274.752:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-276.752:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-277.814:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-277.831:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-278.838:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-279.852:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-279.859:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-279.877:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-279.911:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-279.940:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-279.952:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-279.953:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-279.956:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-280.956:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-282.998:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-282.999:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-284.999:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-285.1010:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-286.1064:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-286.1068:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-286.1089:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-286.1094:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-288.1094:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-288.1158:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-288.1167:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-288.1189:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-289.1189:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-290.1239:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-291.1246:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-292.1293:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-294.1346:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-294.1364:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-294.1376:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-294.1377:*:*:*:*:*:*
haproxy haproxy_enterprise 2.4r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.4r1:1.0.0-294.1442:*:*:*:*:*:*
haproxy haproxy_enterprise 2.6r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.6r1:1.0.0-281.466:*:*:*:*:*:*
haproxy haproxy_enterprise 2.6r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.6r1:1.0.0-282.561:*:*:*:*:*:*
haproxy haproxy_enterprise 2.6r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.6r1:1.0.0-283.562:*:*:*:*:*:*
haproxy haproxy_enterprise 2.6r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.6r1:1.0.0-283.565:*:*:*:*:*:*
haproxy haproxy_enterprise 2.6r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.6r1:1.0.0-283.616:*:*:*:*:*:*
haproxy haproxy_enterprise 2.6r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.6r1:1.0.0-283.632:*:*:*:*:*:*
haproxy haproxy_enterprise 2.6r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.6r1:1.0.0-283.633:*:*:*:*:*:*
haproxy haproxy_enterprise 2.6r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.6r1:1.0.0-283.636:*:*:*:*:*:*
haproxy haproxy_enterprise 2.6r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.6r1:1.0.0-284.636:*:*:*:*:*:*
haproxy haproxy_enterprise 2.6r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.6r1:1.0.0-285.726:*:*:*:*:*:*
haproxy haproxy_enterprise 2.6r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.6r1:1.0.0-285.727:*:*:*:*:*:*
haproxy haproxy_enterprise 2.6r1 cpe:2.3:a:haproxy:haproxy_enterprise:2.6r1:1.0.0-287.727:*:*:*:*:*:*

References for CVE-2025-11230

cvelogic Threat Intelligence