---
title: "CVE-2026-67549: OpenImageIO - Buffer Overflow"
description: "OpenImageIO < 3.1.16.0 contains a heap out-of-bounds write caused by improper bit conversion in TIFFInput::read_native_scanline_locked() when processing crafted 1-bit contiguous CMYK TIFF images, letting attackers cause memory corruption, exploit requires crafted TIFF file."
url: https://panop.io/threat-heartbeat/CVE-2026-67549/
---

# CVE-2026-67549 OpenImageIO - Buffer Overflow

OpenImageIO < 3.1.16.0 contains a heap out-of-bounds write caused by improper bit conversion in TIFFInput::read\_native\_scanline\_locked() when processing crafted 1-bit contiguous CMYK TIFF images, letting attackers cause memory corruption, exploit requires crafted TIFF file.

CVSS base score 7.6 /10

High

CISA KEV

Not listed

Public exploit

Proof of concept available

Authentication

Not required

EPSS

0.29% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-67549)

## Details

Type

Buffer Overflow

Impact

Remote Code Execution, Denial Of Service

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H

Published

18 September 2026

Updated

15 October 2026

Weakness

[CWE-122](https://cwe.mitre.org/data/definitions/122.html)

## Vendor fix

Update to version 3.1.16.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-67549](https://nvd.nist.gov/vuln/detail/CVE-2026-67549)
- [https://github.com/user-attachments/files/29615314/poc.zip](https://github.com/user-attachments/files/29615314/poc.zip)
- [https://github.com/AcademySoftwareFoundation/OpenImageIO/commit/6e9b86ee4cce8fd7bed6cfb101a266d8f8a296d4](https://github.com/AcademySoftwareFoundation/OpenImageIO/commit/6e9b86ee4cce8fd7bed6cfb101a266d8f8a296d4)
- [https://github.com/AcademySoftwareFoundation/OpenImageIO/pull/5296](https://github.com/AcademySoftwareFoundation/OpenImageIO/pull/5296)
- [https://github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.1.16.0](https://github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.1.16.0)
- [https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-3wxw-rqhw-j2w4](https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-3wxw-rqhw-j2w4)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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