{"cve":"CVE-2024-10549","nvd":{"published":"2025-03-20T10:15:17.263","modified":"2026-06-17T06:55:54.510","status":"Modified","description":"A vulnerability in the `/3/Parse` endpoint of h2oai/h2o-3 version 3.46.0.1 allows for a denial of service (DoS) attack. The endpoint uses a user-specified string to construct a regular expression, which is then applied to another user-specified string. By sending multiple simultaneous requests, an attacker can exhaust all available threads, leading to a complete denial of service.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-1333"],"references":["https://huntr.com/bounties/ce7bd2d6-fd38-440d-a91a-dd8f3fc06bc2"],"products":["h2o:h2o"],"source":"nvd","synced_at":"2026-10-19T22:00:17.429720821+00:00"},"epss":{"cve":"CVE-2024-10549","score":0.00637,"percentile":0.50521,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-wwr9-4gmr-xvq9","url":"https://osv.dev/vulnerability/GHSA-wwr9-4gmr-xvq9","summary":"H2O Vulnerable to Denial of Service (DoS) via `/3/Parse` Endpoint","modified":"2026-07-07T17:56:31.764443319Z","packages":[{"ecosystem":"PyPI","name":"h2o","purl":"pkg:pypi/h2o","ranges":[">=3.30.0.7 <=3.46.0.1"],"fixed":[]},{"ecosystem":"Maven","name":"ai.h2o:h2o-core","purl":"pkg:maven/ai.h2o/h2o-core","ranges":[">=3.30.0.7 <=3.46.0.1"],"fixed":[]}]},{"id":"PYSEC-2026-1445","url":"https://osv.dev/vulnerability/PYSEC-2026-1445","summary":"H2O Vulnerable to Denial of Service (DoS) via `/3/Parse` Endpoint","modified":"2026-07-07T17:46:12.582271207Z","packages":[{"ecosystem":"PyPI","name":"h2o","purl":"pkg:pypi/h2o","ranges":[">=3.30.0.7 <=3.46.0.1"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}