CVE-2025-11230

HIGHNVD 7.57.5—Trending — 4 sources updated this week

7.5

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

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 64.8%
KEV: Not listed

Published

November 19, 2025

Last Modified

December 19, 2025

References (1)

security@ubuntuhttps://www.haproxy.com/blog/october-2025-cve-2025-11230-haproxy-mjson-library-denial-of-service-vulnerability

Vendor Advisories for CVE-2025-11230(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

CVE-2025-11230
Microsoft Security Response Center (MSRC)Medium
Denial of service vulnerability in HAProxy mjson library

Patch Availability(10)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	vim-haproxy (3.0.8-1ubuntu1.2) @ plucky	2026-05-29	ubuntu
redhat	haproxy-main-3.0.19-1.hum1	2026-04-17	redhat
redhat	rhceph/rhceph-haproxy-rhel9:8	2025-12-02	redhat
redhat	haproxy-0:2.4.22-3.el9_4.1	2025-12-01	redhat
redhat	haproxy-0:2.4.7-2.el9_0.3	2025-12-01	redhat
redhat	haproxy-0:2.4.17-6.el9_2.3	2025-12-01	redhat
redhat	haproxy-0:2.8.14-1.el9_7.1	2025-11-18	redhat
redhat	haproxy-0:3.0.5-4.el10_1.1	2025-11-18	redhat
redhat	haproxy-0:3.0.5-4.el10_0.1	2025-11-18	redhat
redhat	haproxy-0:2.4.22-4.el9_6.1	2025-11-18	redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-407

Additional Vendor Advisories

(10)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 10× in last 7d / 10× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-29 19:05 UTCEG score recompute
2026-05-29 19:05 UTCVendor advisory
2026-05-29 19:04 UTCGHSA enrichment
2026-05-29 13:43 UTCepss_batch

Frequently asked(5)

What is CVE-2025-11230?

CVE-2025-11230 is a high vulnerability published on November 19, 2025. Inefficient algorithm complexity in mjson in HAProxy allows remote attackers to cause a denial of service via specially crafted JSON requests.

When was CVE-2025-11230 disclosed?

CVE-2025-11230 was first published in the National Vulnerability Database on November 19, 2025, with the most recent update on December 19, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2025-11230 actively exploited?

CVE-2025-11230 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 64.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2025-11230?

CVE-2025-11230 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2025-11230?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-11230, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2025-11230

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