Integer overflow in Academysoftwarefoundation Openimageio

CVE-2026-113681

OpenImageIO before 3.0.20.0, 3.1.x before 3.1.15.0, and 3.2.x before 3.2.0.3-beta1 contains an integer overflow in cineon::Codec::Read that undersizes the scanline buffer, causing a heap out-of-bounds read. Attackers can supply a crafted Cineon file with a huge declared width that wraps the size calculation to zero, so UnPackPacked reads past a 4-byte buffer and crashes the application.

Vulnerability class: Integer Overflow

Published .

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-113681?
CVE-2026-113681 is a medium-severity vulnerability in Academysoftwarefoundation Openimageio, classified under Integer Overflow or Wraparound. CVSS score: 5.5/10. Published 2026-10-20.
How severe is CVE-2026-113681?
Medium severity. CVSS v3 base score is 5.5 out of 10.