What is CVE-2026-21676?

CVE-2026-21676 is a high-severity vulnerability in Color Iccdev, classified under Heap-based Buffer Overflow. CVSS score: 8.8/10. Published 2026-01-06.

How severe is CVE-2026-21676?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in Color Iccdev

CVE-2026-21676

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.

Vulnerability class: Buffer Overflow

Published 2026-01-06 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (31.6th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 31.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000

Affected products

Color Iccdev
Internationalcolorconsortium Iccdev — versions < 2.3.1.1

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

github.com/InternationalColorConsortium/iccDEV/security/advisories/GHSA-j5vv-p2… (Patch, Vendor Advisory)
github.com/InternationalColorConsortium/iccDEV/issues/215 (Exploit, Issue Tracking, Vendor Advisory)
github.com/InternationalColorConsortium/iccDEV/commit/e4c38a67d06073b38d58580b0… (Patch)

Frequently asked questions

What is CVE-2026-21676?: CVE-2026-21676 is a high-severity vulnerability in Color Iccdev, classified under Heap-based Buffer Overflow. CVSS score: 8.8/10. Published 2026-01-06.
How severe is CVE-2026-21676?: High severity. CVSS v3 base score is 8.8 out of 10.