CVE-2026-34353 Integer overflow in OCaml
An integer overflow in OCaml's Bigarray.reshape allows attackers to read arbitrary memory when processing untrusted data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-34353?
CVE-2026-34353 is a medium-severity vulnerability in OCaml, published on 27 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In OCaml through 4.14.3, Bigarray.reshape allows an integer overflow, and resultant reading of arbitrary memory, when untrusted data is processed.
Weakness: CWE-190
Which versions are affected by CVE-2026-34353?
It affects 1 product.
Products include Ocaml Ocaml.
How do I fix CVE-2026-34353?
Upgrade to a fixed version.
Is CVE-2026-34353 being exploited?
There is no known exploitation of CVE-2026-34353 in the wild and no public exploit code.
Other vulnerabilities in OCaml
Sources
Also known as AZL-81104, DEBIAN-CVE-2026-34353, GHSA-6p45-jv22-32gp, OESA-2026-1889, OESA-2026-1890, OESA-2026-1891 and 4 more.