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CVE-2026-28364

Published: Feb 27, 2026Updated: Jul 15, 2026 Sources: CVE List NVDCWE-126
7.9HIGH
NVD MITRE
EPSS Score
0.2%
Top 88.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

In OCaml before 4.14.3 and 5.x before 5.4.1, a buffer over-read in Marshal deserialization (runtime/intern.c) enables remote code execution through a multi-phase attack chain. The vulnerability stems from missing bounds validation in the readblock() function, which performs unbounded memcpy() operations using attacker-controlled lengths from crafted Marshal data.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:LPR:NUI:NS:CC:HI:LA:N
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-126CWE-125

Affected Products

OCaml
oss-project·FRaka opam, postgresql-ocaml
OCamlLibrary
OSS Libraries / generic-library
and 1 more affected products View all →

Exploitability

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Collection
View detailed technique mapping

References

https://github.com/ocaml/security-advisories/blob/generated-osv/2026/OSEC-2026-01.json
github.com
https://osv.dev/vulnerability/OSEC-2026-01
osv.dev
https://access.redhat.com/security/cve/CVE-2026-28364
access.redhat.com
and 2 more references View all →

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