CVE-2026-67549: CWE-122: Heap-based Buffer Overflow in AcademySoftwareFoundation OpenImageIO
OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.1.16.0, A crafted 1-bit contiguous cmyk tiff is exposed through a native uint1 imagespec, so callers allocate a bit-packed buffer. tiffinput::read_native_scanline_locked() nevertheless invokes tiffinput::bit_convert() with 8-bit output and writes one expanded byte per value into that smaller buffer, resulting in a heap out-of-bounds write and memory corruption. The affected implementation is identified by src/tiff.imageio/tiffinput.cpp, TIFFInput::bit_convert(), TIFFInput::read_native_scanline_locked(), PHOTOMETRIC_SEPARATED, 1-bit CMYK, and native uint1 ImageSpec, which define the relevant source path, functions, state, and trigger. This issue is fixed in 3.1.16.0.
AI Analysis
Technical Summary
OpenImageIO versions before 3.1.16.0 contain a heap-based buffer overflow vulnerability (CWE-122) in the TIFF image input processing code. Specifically, when handling a crafted 1-bit contiguous CMYK TIFF image, the software allocates a bit-packed buffer but writes expanded 8-bit data into it, causing a heap out-of-bounds write and memory corruption. The vulnerable code path involves TIFFInput::bit_convert() and TIFFInput::read_native_scanline_locked() functions in src/tiff.imageio/tiffinput.cpp. This vulnerability is fixed in version 3.1.16.0.
Potential Impact
Successful exploitation can lead to memory corruption, potentially causing denial of service or other impacts due to heap overflow. The CVSS 3.1 score is 7.6 (high severity), indicating network attack vector, low attack complexity, no privileges required, user interaction required, and impacts on confidentiality, integrity, and availability.
Mitigation Recommendations
Upgrade OpenImageIO to version 3.1.16.0 or later, where this vulnerability is fixed. No other specific mitigations are indicated.
CVE-2026-67549: CWE-122: Heap-based Buffer Overflow in AcademySoftwareFoundation OpenImageIO
Description
OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.1.16.0, A crafted 1-bit contiguous cmyk tiff is exposed through a native uint1 imagespec, so callers allocate a bit-packed buffer. tiffinput::read_native_scanline_locked() nevertheless invokes tiffinput::bit_convert() with 8-bit output and writes one expanded byte per value into that smaller buffer, resulting in a heap out-of-bounds write and memory corruption. The affected implementation is identified by src/tiff.imageio/tiffinput.cpp, TIFFInput::bit_convert(), TIFFInput::read_native_scanline_locked(), PHOTOMETRIC_SEPARATED, 1-bit CMYK, and native uint1 ImageSpec, which define the relevant source path, functions, state, and trigger. This issue is fixed in 3.1.16.0.
CVSS v3.1
Score 7.6high
Affected software
AcademySoftwareFoundation
OpenImageIO
pkg:github/academysoftwarefoundation/OpenImageIORun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
OpenImageIO versions before 3.1.16.0 contain a heap-based buffer overflow vulnerability (CWE-122) in the TIFF image input processing code. Specifically, when handling a crafted 1-bit contiguous CMYK TIFF image, the software allocates a bit-packed buffer but writes expanded 8-bit data into it, causing a heap out-of-bounds write and memory corruption. The vulnerable code path involves TIFFInput::bit_convert() and TIFFInput::read_native_scanline_locked() functions in src/tiff.imageio/tiffinput.cpp. This vulnerability is fixed in version 3.1.16.0.
Potential Impact
Successful exploitation can lead to memory corruption, potentially causing denial of service or other impacts due to heap overflow. The CVSS 3.1 score is 7.6 (high severity), indicating network attack vector, low attack complexity, no privileges required, user interaction required, and impacts on confidentiality, integrity, and availability.
Mitigation Recommendations
Upgrade OpenImageIO to version 3.1.16.0 or later, where this vulnerability is fixed. No other specific mitigations are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-07-29T18:47:17.075Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aad608e55bf5e2cf5360fb0
Added to database: 09/18/2026, 16:02:22 UTC
Last enriched: 09/18/2026, 16:16:28 UTC
Last updated: 09/18/2026, 23:18:54 UTC
Views: 12
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.