PT-2025-12044 · H2O.Ai · H2O-3

CVE-2024-10549 · Published 2025-03-20 · Updated 2026-07-07

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions h2oai/h2o-3 version 3.46.0.1

Description A denial of service (DoS) attack is possible due to a vulnerability in the "/3/Parse" endpoint. This 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.

Recommendations For version 3.46.0.1, as a temporary workaround, consider restricting access to the "/3/Parse" endpoint until a patch is available. Avoid using the endpoint with user-specified strings that could lead to excessive resource utilization.

Exploit

Fix

DoS

Resource Exhaustion

Weakness Enumeration

CWE-400

CWE-1333

Related Identifiers

CVE-2024-10549

GHSA-WWR9-4GMR-XVQ9

PYSEC-2026-1445

Affected Products

H2O-3

References · 12

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/10xxx/CVE-2024-10549.json · Exploit
• 🔥 https://huntr.com/bounties/ce7bd2d6-fd38-440d-a91a-dd8f3fc06bc2 · Exploit
• https://osv.dev/vulnerability/GHSA-wwr9-4gmr-xvq9 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2024-10549 · Vendor Advisory
• https://osv.dev/vulnerability/PYSEC-2026-1445 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-10549 · Security Note
• https://github.com/h2oai/h2o-3/blob/51c25940ded8b7d0acc8f3f72329fd9dedbb3a34/h2o-core/src/main/java/water/api/ParseHandler.java#L80 · Note
• https://github.com/h2oai/h2o-3 · Note
• https://pypi.org/project/h2o · Note
• https://t.me/cvenotify/128845 · Telegram Post
• https://github.com/advisories/GHSA-wwr9-4gmr-xvq9 · Note
• https://twitter.com/CVEnew/status/1902670971125006581 · Twitter Post