What is the CVSS score of CVE-2026-21691?

CVE-2026-21691 has a CVSS 3.1 base score of 5.4 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L. EPSS exploitation probability: 0.1%.

Which versions of Iccdev are affected by CVE-2026-21691?

CVE-2026-21691 presents moderate security risk, a input validation vulnerability rated CVSS 5.4. Exploitation could compromise the security of affected deployments.. A patch is available.

Is there a public PoC exploit available for CVE-2026-21691?

Yes, a public proof-of-concept exploit is available for CVE-2026-21691. Prioritise patching immediately. EPSS: 0.1%.

Iccdev CVE-2026-21691

MEDIUM

Improper Input Validation (CWE-20)

2026-01-07 security-advisories@github.com

Code Injection Iccdev

5.4

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

5.4 MEDIUM

AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

Low

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Jan 12, 2026 - 18:26 vuln.today

Public exploit code

Patch released

Jan 12, 2026 - 18:26 nvd

Patch available

CVE Published

Jan 07, 2026 - 22:15 nvd

MEDIUM 5.4

DescriptionGitHub Advisory

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 Type Confusion vulnerability in CIccTag:IsTypeCompressed(). 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.

AnalysisAI

iccDEV versions prior to 2.3.1.2 contain a type confusion vulnerability in the CIccTag::IsTypeCompressed() function that allows unauthenticated attackers to cause integrity violations or service disruption by crafting malicious ICC color profiles. The vulnerability requires user interaction to exploit and affects applications using the iccDEV library to process color management profiles. …

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Vulnerability AssessmentAI

Risk Assessment	CVSS 5.4 (MEDIUM). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An attacker could exploit this vulnerability to compromise the affected system.
Remediation	A vendor patch is available — apply it immediately. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. …

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CVE-2026-21691 vulnerability details – vuln.today

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