CVE-2026-67549Public exploitNetwork attack vectorHinoki check available

Process crash via undersized TIFF conversion buffer

Published Sep 18, 2026 · Updated Sep 18, 2026

Heap buffer overflow in OpenImageIO before 3.1.16.0 allows remote attackers to crash image-processing applications via a crafted TIFF. TIFFInput::read_native_scanline_locked() exposes 1-bit contiguous CMYK data as bit-packed uint1 but calls bit_convert() for 8-bit output, writing one byte per value into the smaller caller buffer. Processing the file with a read path such as iinfo -hash requires user interaction and reliably aborts the process after corrupting heap memory.

CVSS severity7.6
High
EPSS probability0.29%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Heap buffer overflow in OpenImageIO before 3.1.16.0 allows remote attackers to crash image-processing applications via a crafted TIFF. TIFFInput::read_native_scanline_locked() exposes 1-bit contiguous CMYK data as bit-packed uint1 but calls bit_convert() for 8-bit output, writing one byte per value into the smaller caller buffer. Processing the file with a read path such as iinfo -hash requires user interaction and reliably aborts the process after corrupting heap memory.

The record

CVE
CVE-2026-67549
Published
Sep 18, 2026
Updated
Sep 18, 2026
Vendor
Academy Software Foundation
Product
OpenImageIO
Classifications
CWE-787, CWE-131, CWE-122
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 3.1.16.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Academy Software Foundation · OpenImageIOversion=< 3.1.16.0

Published CVSS scores

7.6GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-131Incorrect Calculation of Buffer Size
CWE-122Heap-based Buffer Overflow

Public exploit references

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Technologies

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