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CVE-2025-6544

Deserialization Vulnerability in h2oai/h2o-3

Published: Sep 21, 2025Updated: Oct 8, 2025 Sources: CVE List NVD GHSA BDUCWE-502
9.8CRITICAL
NVD MITRE
EPSS Score
0.8%
Top 45.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

Description

H2O affected by a deserialization vulnerability

No summary for this CVE yet.

CVSS Vector Breakdown

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

CWE-502

Affected Products

Maven
package-ecosystem
ai.h2o:h2o-core
OSS Libraries
PyPI
package-ecosystem
h2o
OSS Libraries
h2oai
commercial
h2oai/h2o-3Mixed
AI / ML / ml-framework
h2o
oss-projectaka quicly, h2o web server, picotls
h2oOn-prem
Networking Infrastructure / load-balancer-proxy
H2O.ai, Inc.
commercial·US
H2OMixed
AI / ML / ml-framework

Exploitability

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

3 techniques
Execution
Initial Access
View detailed technique mapping

References

https://nvd.nist.gov/vuln/detail/CVE-2025-6544
nvd.nist.gov
https://github.com/h2oai/h2o-3/commit/0298ee348f5c73673b7b542158081e79605f5f25
github.com
https://github.com/h2oai/h2o-3
github.com
and 2 more references View all →

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