VULNERABILITY INTELLIGENCE

CVE-2026-28364

CVSS score7.9 HIGH
EPSS probability0.24%
CISA KEVNot currently listed
Published2026-02-27
Last modified2026-07-15
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N

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.

Weakness classification

  • cve@mitre.org: CWE-126
  • 0b0ca135-0b70-47e7-9f44-1890c2a1c46c: CWE-125

Primary references