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CVE-2026-42450

OpenColorIO vulnerable to stack buffer overflow via unbounded `sscanf %s` in Spi3D (.spi3d) LUT parser

8.4 HighFix available

OpenColorIO is a color management framework for visual effects and animation. Prior to version 2.5.2, FileFormatSpi3D.cpp:163 uses sscanf with %s into 64-byte stack buffers when parsing LUT data lines. Input comes from lineBuffer[4096], so a crafted .spi3d file can overflow by ~4000 bytes on non-Windows. Version 2.5.2 fixes the issue.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
None
User interaction
Active

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

0.18%Up 0.2 points since Jun 12, 2026
90%50%10%1%

What each source reports

CVE List Score used 8.4

OpenColorIO vulnerable to stack buffer overflow via unbounded `sscanf %s` in Spi3D (.spi3d) LUT parser

OpenColorIO is a color management framework for visual effects and animation. Prior to version 2.5.2, FileFormatSpi3D.cpp:163 uses sscanf with %s into 64-byte stack buffers when parsing LUT data lines. Input comes from lineBuffer[4096], so a crafted .spi3d file can overflow by ~4000 bytes on non-Windows. Version 2.5.2 fixes the issue.

Record
CVE-2026-42450
CVSS 4.0
8.4 HighCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Weakness
CWE-120
Updated
2026-11-02
EUVDEUVD-2026-38769 8.4

OpenColorIO is a color management framework for visual effects and animation. Prior to version 2.5.2, FileFormatSpi3D.cpp:163 uses sscanf with %s into 64-byte stack buffers when parsing LUT data lines. Input comes from lineBuffer[4096], so a crafted .spi3d file can overflow by ~4000 bytes on non-Windows. Version 2.5.2 fixes the issue.

Record
EUVD-2026-38769
CVSS 4.0
8.4 HighCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Updated
2026-11-02
NVD 8.4

OpenColorIO is a color management framework for visual effects and animation. Prior to version 2.5.2, FileFormatSpi3D.cpp:163 uses sscanf with %s into 64-byte stack buffers when parsing LUT data lines. Input comes from lineBuffer[4096], so a crafted .spi3d file can overflow by ~4000 bytes on non-Windows. Version 2.5.2 fixes the issue.

Record
CVE-2026-42450
CVSS 4.0
8.4 HighCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness
CWE-120
Updated
2026-11-02
OSV 8.4

OpenColorIO vulnerable to stack buffer overflow via unbounded `sscanf %s` in Spi3D (.spi3d) LUT parser

OpenColorIO is a color management framework for visual effects and animation. Prior to version 2.5.2, FileFormatSpi3D.cpp:163 uses sscanf with %s into 64-byte stack buffers when parsing LUT data lines. Input comes from lineBuffer[4096], so a crafted .spi3d file can overflow by ~4000 bytes on non-Windows. Version 2.5.2 fixes the issue.

Record
CVE-2026-42450
CVSS 4.0
8.4 HighCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Weakness
CWE-120
Updated
2026-11-02
OSVDEBIAN-CVE-2026-42450 8.4

OpenColorIO is a color management framework for visual effects and animation. Prior to version 2.5.2, FileFormatSpi3D.cpp:163 uses sscanf with %s into 64-byte stack buffers when parsing LUT data lines. Input comes from lineBuffer[4096], so a crafted .spi3d file can overflow by ~4000 bytes on non-Windows. Version 2.5.2 fixes the issue.

Record
DEBIAN-CVE-2026-42450
CVSS 4.0
8.4 HighCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Updated
2026-11-02
OSVUBUNTU-CVE-2026-42450 8.4

OpenColorIO is a color management framework for visual effects and animation. Prior to version 2.5.2, FileFormatSpi3D.cpp:163 uses sscanf with %s into 64-byte stack buffers when parsing LUT data lines. Input comes from lineBuffer[4096], so a crafted .spi3d file can overflow by ~4000 bytes on non-Windows. Version 2.5.2 fixes the issue.

Record
UBUNTU-CVE-2026-42450
CVSS 4.0
8.4 HighCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Updated
2026-11-02
OSVopenSUSE-SU-2026:10801-1 No score

OpenColorIO-devel-2.5.2-1.1 on GA media

These are all security issues fixed in the OpenColorIO-devel-2.5.2-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2026:10801-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
opencolorio
Debian:12
 All versions, plus listed versions
2.1.2+dfsg1-42.1.2+dfsg1-4.12.1.2+dfsg1-4.22.1.3+dfsg-12.1.3+dfsg-1.1
Show 9 moreShow less
2.1.3+dfsg-1.1+loong642.1.3+dfsg-1.1~exp12.1.3+dfsg-1.22.1.3+dfsg-22.5.1+dfsg-12.5.1+dfsg-22.5.1+dfsg-32.5.1+dfsg-42.6.0+dfsg-1
 None known
opencolorio
Debian:13
 All versions, plus listed versions
2.1.3+dfsg-1.22.1.3+dfsg-22.5.1+dfsg-12.5.1+dfsg-22.5.1+dfsg-32.5.1+dfsg-42.6.0+dfsg-1
 None known
opencolorio
Debian:14
 All versions, plus listed versions
2.1.3+dfsg-1.22.1.3+dfsg-22.5.1+dfsg-12.5.1+dfsg-22.5.1+dfsg-32.5.1+dfsg-42.6.0+dfsg-1
 None known
opencolorio
Ubuntu:16.04:LTS
 All versions, plus listed versions
1.0.9~dfsg0-4
 None known
opencolorio
Ubuntu:18.04:LTS
 All versions, plus listed versions
1.0.9~dfsg0-111.0.9~dfsg0-11build11.0.9~dfsg0-121.1.0~dfsg0-1
 None known
opencolorio
Ubuntu:20.04:LTS
 All versions, plus listed versions
1.1.1~dfsg0-31.1.1~dfsg0-51.1.1~dfsg0-5ubuntu11.1.1~dfsg0-6
 None known
opencolorio
Ubuntu:22.04:LTS
 All versions, plus listed versions
1.1.1~dfsg0-71.1.1~dfsg0-7.11.1.1~dfsg0-7.1build1
 None known
opencolorio
Ubuntu:24.04:LTS
 All versions, plus listed versions
2.1.2+dfsg1-4.2build12.1.3+dfsg-12.1.3+dfsg-1build12.1.3+dfsg-1.1build22.1.3+dfsg-1.1build3
 None known
opencolorio
Ubuntu:25.10
 All versions, plus listed versions
2.1.3+dfsg-1.2
 None known
opencolorio
Ubuntu:26.10
 All versions, plus listed versions
2.5.1+dfsg-12.5.1+dfsg-1build12.5.1+dfsg-42.5.1+dfsg-4build1
 None known
opencolorio
Ubuntu:26.04:LTS
 All versions, plus listed versions
2.1.3+dfsg-1.22.1.3+dfsg-22.5.1+dfsg-1
 None known
OpenColorIO
openSUSE:Tumbleweed
 before 2.5.2-1.1
2.5.2-1.1

History

History
RecordedChangedSources
first indexedCVE List, EUVD, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-42450 is a high vulnerability (CVSS 8.4) in Academysoftwarefoundation Opencolorio, published May 17, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.18%, the 7th percentile. Fixed in OpenColorIO 2.5.2-1.1.

References

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