ImageSharp: ICC CLUT parsing allocates from unvalidated channel and grid dimensions

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-106114
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-06 18:16:53 UTC
Updated2026-10-06 20:17:17 UTC
DescriptionImageSharp is a 2D graphics library. From 1.0.0-beta0001 until 4.1.2, ICC CLUT parsing calculates allocation sizes from attacker-declared channel and grid dimensions before confirming that the profile contains the declared values. IccDataReader.ReadClutF32 can request a large float array, and earlier public IccProfile.Entries parsing paths can allocate a large jagged representation, from a short truncated profile. In version 4, automatic image conversion reaches the parser when DecoderOptions.ColorProfileHandling is Convert; the default Preserve mode avoids that conversion path. The demonstrated impact is memory pressure and input-validation failure, not unhandled process termination. This issue is fixed in version 4.1.2.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

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

Problem Types: CWE-789 | CWE-789 CWE-789: Memory Allocation with Excessive Size Value

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
3.1CNADECLARED5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA SixLabors ImageSharp affected >= 1.0.0-beta0001, < 4.1.2 Not specified

References

ReferenceSourceLinkTags
github.com/SixLabors/ImageSharp/pull/3187 [email protected] github.com
github.com/SixLabors/ImageSharp/security/advisories/GHSA-gwg2-r3hj-4w44 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/SixLabors/ImageSharp/releases/tag/v4.1.2 [email protected] github.com
github.com/SixLabors/ImageSharp/commit/8de892a7623aa8a09ba2333b624c8d2eb... [email protected] github.com
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