CVE-2026-21687
📋 TL;DR
CVE-2026-21687 is an undefined behavior vulnerability in the CIccTagCurve constructor of the iccDEV library that processes ICC color profiles. This could lead to memory corruption, crashes, or potential code execution when processing malicious ICC profiles. Users of iccDEV library versions before 2.3.1.2 are affected.
💻 Affected Systems
- iccDEV library
📦 What is this software?
Iccdev by Color
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise if exploited via malicious ICC profile processing
Likely Case
Application crashes, denial of service, or memory corruption when processing malformed ICC profiles
If Mitigated
Limited to application crashes if proper input validation and sandboxing are implemented
🎯 Exploit Status
Exploitation requires processing a malicious ICC profile, but no public exploit code is available
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.3.1.2
Vendor Advisory: https://github.com/InternationalColorConsortium/iccDEV/security/advisories/GHSA-prmm-g479-4fv7
Restart Required: Yes
Instructions:
1. Update iccDEV library to version 2.3.1.2 or later. 2. Recompile applications using the library. 3. Restart affected services.
🔧 Temporary Workarounds
No known workarounds
allThe vendor advisory states no workarounds are available
🧯 If You Can't Patch
- Restrict processing of untrusted ICC profiles to isolated environments
- Implement strict input validation and sanitization for ICC profile processing
🔍 How to Verify
Check if Vulnerable:
Check if your application uses iccDEV library version < 2.3.1.2Check Version:
Check library version in build configuration or runtime library informationVerify Fix Applied:
Verify iccDEV library version is 2.3.1.2 or later and applications have been recompiled📡 Detection & Monitoring
Log Indicators:
- Application crashes during ICC profile processing
- Memory access violation errors
Network Indicators:
- Unusual ICC profile uploads to applications
SIEM Query:
Application logs containing 'iccDEV', 'CIccTagCurve', or ICC processing errors