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CVE-2024-10549

Denial of Service by ReDOS in h2oai/h2o-3

Published: Mar 20, 2025Updated: Oct 15, 2025 Sources: CVE List NVD GHSACWE-1333
NVD MITRE
7.5CVSSHIGH
EPSS Score
0.6%
Top 56.6%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
No Fix Available

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 Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-1333

Affected Products

h2oai/h2o-3h2oai
Mixed
AI / ML / ml-framework
h2oh2o
On-prem
Networking Infrastructure / load-balancer-proxy
h2oPyPIOSS Libraries
ai.h2o:h2o-coreMavenOSS Libraries
h2oaicommercialAI / ML
h2ooss-projectNetworking Infrastructureaka h2o web server, h2o, picotls, quicly
pypipackage-ecosystemOSS Libraries
mavenpackage-ecosystemOSS Libraries

Attack Graph

Products CVE Techniques Tactics

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Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details

MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

https://huntr.com/bounties/ce7bd2d6-fd38-440d-a91a-dd8f3fc06bc2
huntr.com
https://nvd.nist.gov/vuln/detail/CVE-2024-10549
nvd.nist.gov
https://github.com/h2oai/h2o-3
github.com
and 1 more references View all →

Timeline

Published
Mar 20, 2025
Last Updated
Oct 15, 2025

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