# CVE-2026-21681: iccDEV has Undefined Behavior runtime error: nan is outside the range .. IccProfLib/IccTagBasic.cpp

> Processing malformed ICC profiles in iccDEV causes undefined behavior, potentially leading to application crashes or instability.

- **Severity:** High 7.1 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 7 Jan 2026
- **Updated:** 7 Jan 2026
- **Also known as:** GHSA-v4qq-v3c3-x62x

## What is CVE-2026-21681?

CVE-2026-21681 is a high-severity vulnerability in Color Iccdev, published on 7 Jan 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

iccDEV provides a set of libraries and tools that allow for the interaction, manipulation, and application of International Color Consortium (ICC) color management profiles. Versions prior to 2.3.1.2 have a Undefined Behavior runtime error. This vulnerability affects users of the iccDEV library who process ICC color profiles. Version 2.3.1.2 contains a patch. No known workarounds are available.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2026-21681?

It affects 1 product.


Products: Color Iccdev.

## How do I fix CVE-2026-21681?

No fix has been published for CVE-2026-21681 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-21681 being exploited?

There is no known exploitation of CVE-2026-21681 in the wild and no public exploit code.

## Other vulnerabilities in Color Iccdev

- [CVE-2026-21675](https://insights.sbomify.com/CVE-2026-21675/): iccDEV has a Use After Free vulnerability in CIccCmm class via improper hint manager object deletion (critical 9.8)
- [CVE-2026-24405](https://insights.sbomify.com/CVE-2026-24405/): iccDEV has Heap Buffer Overflow in CIccMpeCalculator::Read() (high 8.8)
- [CVE-2026-24406](https://insights.sbomify.com/CVE-2026-24406/): iccDEV has Heap Buffer Overflow in CIccTagNamedColor2::SetSize() (high 8.8)
- [CVE-2026-24412](https://insights.sbomify.com/CVE-2026-24412/): iccDEV has Heap Buffer Overflow in icCurvesFromXml() (high 8.8)
- [CVE-2026-22861](https://insights.sbomify.com/CVE-2026-22861/): iccDEV has a heap-buffer-overflow in SIccCalcOp::Describe() at IccProfLib/IccMpeCalc.cpp (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-21681 and fix it if it is affected.

What it is: CVE-2026-21681 is a high-severity vulnerability in Color Iccdev, published on 7 Jan 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-21681 in the wild and no public exploit code.

Affected product: Color Iccdev. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-21681/ (Markdown: https://insights.sbomify.com/CVE-2026-21681/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-21681
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-21681
- OSV: https://osv.dev/vulnerability/CVE-2026-21681

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-21681/
Summaries are generated and may contain mistakes; the official description above is the record.