CVE-2026-28364
CVSS Score
7.9
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-126 |
| Vendor | ocaml |
| Product | ocaml |
| Published | Feb 27, 2026 |
| Last Updated | Feb 27, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
Low
Availability
None
Affected Versions
OCaml / OCaml
0 < 4.14.3 5.0.0 < 5.4.1