CVE-2026-21676: iccDEV has a Heap-based Buffer Overflow in its CIccMBB::Validate() function

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-01-06 · updated 2026-06-17
Weakness: CWE-122

Description

iccDEV provides a set of libraries and tools for working with ICC color management profiles. Versions 2.3.1 and below have a Heap-based Buffer Overflow in its CIccMBB::Validate function which checks tag data validity. This issue is fixed in version 2.3.1.1.

Affected products

InternationalColorConsortium iccDEV: before 2.3.1.1 — fixed in 2.3.1.1

How to fix

Upgrade to a fixed version: InternationalColorConsortium iccDEV 2.3.1.1. Check the vendor advisory for mitigations.

References

https://github.com/InternationalColorConsortium/iccDEV/commit/e4c38a67d06073b38d58580b0cfc78ca61005f84
https://github.com/InternationalColorConsortium/iccDEV/issues/215
https://github.com/InternationalColorConsortium/iccDEV/security/advisories/GHSA-j5vv-p2hv-c392

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