CVE-2025-63649

HIGHNVD 7.57.5—Trending — 3 sources updated this week

7.5

An out-of-bounds read in the http_parser_transfer_encoding_chunked function (mk_server/mk_http_parser.c) of monkey commit f37e984 allows attackers to cause a Denial of Service (DoS) via sending a crafted POST request to the server.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 15.7%
KEV: Not listed

Published

January 29, 2026

Last Modified

February 19, 2026

References (2)

Weakness Classification(1)

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

CWE-125Out-of-bounds Read

Data Freshness Timeline

(refreshed 7× in last 7d / 7× 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.

2026-05-31 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 15:02 UTCEG score recompute
2026-05-29 15:02 UTCGHSA enrichment
2026-05-29 13:44 UTCepss_batch

Frequently asked(5)

What is CVE-2025-63649?

CVE-2025-63649 is a high vulnerability published on January 29, 2026. An out-of-bounds read in the httpparsertransferencodingchunked function (mkserver/mkhttp_parser.c) of monkey commit f37e984 allows attackers to cause a Denial of Service (DoS) via sending a crafted POST request to the server.

When was CVE-2025-63649 disclosed?

CVE-2025-63649 was first published in the National Vulnerability Database on January 29, 2026, with the most recent update on February 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2025-63649 actively exploited?

CVE-2025-63649 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 15.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2025-63649?

CVE-2025-63649 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2025-63649?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-63649, 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

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CVE-2025-63649

📅 Published

🔄 Last Modified

🔗 References (2)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2025-63649?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (2)

Frequently asked(5)

Related CVEs(same CWE)