{"id":"CVE-2024-10549","aliases":["EUVD-2025-7097","GHSA-wwr9-4gmr-xvq9","PYSEC-2026-1445"],"status":"published","title":"Denial of Service by ReDOS in h2oai/h2o-3","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.","severity":{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00637,"percentile":0.50975,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-1333","CWE-400"],"published":"2025-03-20T10:11:32Z","modified":"2026-10-28T02:30:57Z","affected":[{"source":"ghsa","ecosystem":"PyPI","package":"h2o","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.30.0.7"},{"last_affected":"3.46.0.1"}]}]},{"source":"ghsa","ecosystem":"Maven","package":"ai.h2o:h2o-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.30.0.7"},{"last_affected":"3.46.0.1"}]}]},{"source":"osv","ecosystem":"PyPI","package":"h2o","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.30.0.7"},{"last_affected":"3.46.0.1"}]}],"versions":["3.30.0.7","3.30.1.1","3.30.1.2","3.30.1.3","3.32.0.2","3.32.0.3","3.32.0.4","3.32.0.5","3.32.1.1","3.32.1.2","3.32.1.3","3.32.1.4","3.32.1.5","3.32.1.6","3.32.1.7","3.34.0.3","3.34.0.7","3.34.0.8","3.36.0.2","3.36.0.3","3.36.0.4","3.36.1.1","3.36.1.2","3.36.1.3","3.36.1.4","3.36.1.5","3.38.0.1","3.38.0.2","3.38.0.3","3.38.0.4","3.40.0.1","3.40.0.2","3.40.0.3","3.40.0.4","3.42.0.1","3.42.0.2","3.42.0.3","3.42.0.4","3.44.0.1","3.44.0.2","3.44.0.3","3.46.0.1"]},{"source":"osv","ecosystem":"Maven","package":"ai.h2o:h2o-core","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.30.0.7"},{"last_affected":"3.46.0.1"}]}],"versions":["3.30.0.7","3.30.1.1","3.30.1.2","3.30.1.3","3.32.0.1","3.32.0.2","3.32.0.3","3.32.0.4","3.32.0.5","3.32.1.1","3.32.1.2","3.32.1.3","3.32.1.4","3.32.1.5","3.32.1.6","3.32.1.7","3.34.0.1","3.34.0.3","3.34.0.4","3.34.0.5","3.34.0.6","3.34.0.7","3.34.0.8","3.35.0.2","3.36.0.1","3.36.0.2","3.36.0.3","3.36.0.4","3.36.1.1","3.36.1.2","3.36.1.3","3.36.1.4","3.36.1.5","3.38.0.1","3.38.0.2","3.38.0.3","3.38.0.4","3.40.0.1","3.40.0.2","3.40.0.3","3.40.0.4","3.42.0.1","3.42.0.2","3.42.0.3","3.42.0.4","3.44.0.1","3.44.0.2","3.44.0.3","3.46.0.1"]},{"source":"osv","ecosystem":"PyPI","package":"h2o","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.30.0.7"},{"last_affected":"3.46.0.1"}]}],"versions":["3.30.0.7","3.30.1.1","3.30.1.2","3.30.1.3","3.32.0.2","3.32.0.3","3.32.0.4","3.32.0.5","3.32.1.1","3.32.1.2","3.32.1.3","3.32.1.4","3.32.1.5","3.32.1.6","3.32.1.7","3.34.0.3","3.34.0.7","3.34.0.8","3.36.0.2","3.36.0.3","3.36.0.4","3.36.1.1","3.36.1.2","3.36.1.3","3.36.1.4","3.36.1.5","3.38.0.1","3.38.0.2","3.38.0.3","3.38.0.4","3.40.0.1","3.40.0.2","3.40.0.3","3.40.0.4","3.42.0.1","3.42.0.2","3.42.0.3","3.42.0.4","3.44.0.1","3.44.0.2","3.44.0.3","3.46.0.1"]}],"products":[{"vendor":"h2o","product":"h2o"},{"vendor":"h2oai","product":"h2oai/h2o-3"}],"references":[{"url":"https://huntr.com/bounties/ce7bd2d6-fd38-440d-a91a-dd8f3fc06bc2","tags":["Exploit","Third Party Advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-10549","tags":["advisory"]},{"url":"https://github.com/h2oai/h2o-3/blob/51c25940ded8b7d0acc8f3f72329fd9dedbb3a34/h2o-core/src/main/java/water/api/ParseHandler.java#L80","tags":["web"]},{"url":"https://github.com/advisories/GHSA-wwr9-4gmr-xvq9","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/10xxx/CVE-2024-10549.json","tags":["advisory"]},{"url":"https://github.com/h2oai/h2o-3","tags":["package"]},{"url":"https://pypi.org/project/h2o","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2024-10549","title":"Denial of Service by ReDOS in h2oai/h2o-3","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.","status":"published","published":"2025-03-20T10:11:32.621Z","modified":"2025-10-15T12:49:27.711Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-1333"],"updated_at":"2026-11-02T14:34:02.321514Z"}],"euvd":[{"id":"EUVD-2025-7097","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.","status":"published","published":"2025-03-20T10:11:32Z","modified":"2025-10-15T12:49:27Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T20:31:32.493073Z"}],"ghsa":[{"id":"GHSA-wwr9-4gmr-xvq9","title":"H2O Vulnerable to Denial of Service (DoS) via `/3/Parse` Endpoint","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.","status":"published","published":"2025-03-20T12:32:39Z","modified":"2025-10-15T16:00:28Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-400","CWE-1333"],"updated_at":"2026-11-02T14:39:00.807341Z"}],"nvd":[{"id":"CVE-2024-10549","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.","status":"published","published":"2025-03-20T10:15:17.263Z","modified":"2026-06-17T06:55:54.51Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-1333"],"updated_at":"2026-11-02T14:10:45.815983Z"}],"osv":[{"id":"CVE-2024-10549","title":"Denial of Service by ReDOS in h2oai/h2o-3","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.","status":"published","published":"2025-03-20T10:11:32.621Z","modified":"2026-10-28T02:30:57.717103783Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-1333"],"updated_at":"2026-11-02T15:44:37.180532Z"},{"id":"GHSA-wwr9-4gmr-xvq9","title":"H2O Vulnerable to Denial of Service (DoS) via `/3/Parse` Endpoint","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.","status":"published","published":"2025-03-20T12:32:39Z","modified":"2026-07-07T17:56:31.764443319Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-1333","CWE-400"],"updated_at":"2026-11-02T15:46:59.131095Z"},{"id":"PYSEC-2026-1445","title":"H2O Vulnerable to Denial of Service (DoS) via `/3/Parse` Endpoint","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. 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