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TI-2024-09772 Aliases CVE-2024-10549GHSA-wwr9-4gmr-xvq9

Denial of Service by ReDOS in h2oai/h2o-3

Priority HIGH 72CWE-1333Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-1333.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00637 50th percentileScored 2026-11-08
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
h2oaih2oai/h2o-3up to latest—No fix listedCNA
—h2o (PyPI)3.30.0.7 – 3.46.0.1—No fix listedGHSA-wwr9-4gmr-xvq9
—ai.h2o:h2o-core (Maven)3.30.0.7 – 3.46.0.1—No fix listedGHSA-wwr9-4gmr-xvq9
  • h2oai/h2o-3 Vendorh2oai Affected up to latest Fixed in — No fix listed CNA
  • h2o (PyPI) Vendor— Affected 3.30.0.7 – 3.46.0.1 Fixed in — No fix listed GHSA-wwr9-4gmr-xvq9
  • ai.h2o:h2o-core (Maven) Vendor— Affected 3.30.0.7 – 3.46.0.1 Fixed in — No fix listed GHSA-wwr9-4gmr-xvq9

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:h2o:h2o:3.46.0.1:*:*:*:*:*:*:*3.46.0.1Vulnerableh2oai
  • cpe:2.3:a:h2o:h2o:3.46.0.1:*:*:*:*:*:*:* Versions 3.46.0.1 Vulnerable ·h2oai

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2024-10549
  2. 2026-10-03 Alias added: GHSA-wwr9-4gmr-xvq9
  3. 2026-10-25 EPSS moved to the 50th–90th percentile

References

Exploit 1

Advisory 1

Other 2

  • TI-2025-05944 Deserialization Vulnerability in h2oai/h2o-3 CVSS 3.0CRITICAL 9.8
  • TI-2024-09776 Jdbc Deserialization in h2oai/h2o-3 CVSS 3.0CRITICAL 9.8
  • TI-2024-30727 H2O.ai H2O through 3.46.0.4 allows attackers to arbitrarily set the JDBC URL, leading to… CVSS 3.1CRITICAL 9.1
  • TI-2026-03424 Remote Code Execution in h2oai/h2o-3 CVSS 3.1CRITICAL 9.8
  • TI-2024-07992 Arbitrary File Overwrite in h2oai/h2o-3 CVSS 3.0HIGH 8.2
  • TI-2023-06020 External Control of File Name or Path in h2oai/h2o-3 CVSS 3.1HIGH 8.2
See all 29 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences