CVE-2026-42450Public exploit

Client-side memory corruption via unbounded LUT tokens

Published Jun 24, 2026 · Updated Jun 24, 2026

Stack buffer overflow in OpenColorIO before 2.5.2 allows attackers to corrupt process memory by supplying a crafted .spi3d LUT file. FileFormatSpi3D.cpp parses up to 4096 input bytes with unbounded %s conversions into three 64-byte stack buffers, permitting an overwrite of roughly 4000 bytes. Exploitation requires a user or user-initiated tool to load the file; the overflow can crash the process or compromise its confidentiality, integrity, and availability.

CVSS severity8.4
High
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack buffer overflow in OpenColorIO before 2.5.2 allows attackers to corrupt process memory by supplying a crafted .spi3d LUT file. FileFormatSpi3D.cpp parses up to 4096 input bytes with unbounded %s conversions into three 64-byte stack buffers, permitting an overwrite of roughly 4000 bytes. Exploitation requires a user or user-initiated tool to load the file; the overflow can crash the process or compromise its confidentiality, integrity, and availability.

The record

CVE
CVE-2026-42450
Published
Jun 24, 2026
Updated
Jun 24, 2026
Vendor
Academy Software Foundation
Product
OpenColorIO
Classifications
CWE-120, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 24, 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=< 2.5.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Academy Software Foundation · OpenColorIOversion=< 2.5.2

Published CVSS scores

8.4GitHubCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1203Exploitation for Client Execution

Public exploit references

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Technologies

Your stack

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Your stack

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