Description
ImageSharp 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.
Affected products
sixlabors: imagesharp
References5
- github.com/SixLabors/ImageSharp/security/advisories/GHSA-gwg2-r… ExploitVendor Advisory
- github.com/SixLabors/ImageSharp/security/advisories/GHSA-gwg2-r… ExploitVendor Advisory
- github.com/SixLabors/ImageSharp/commit/8de892a7623aa8a09ba2333b… Patch
- github.com/SixLabors/ImageSharp/pull/3187 Issue TrackingPatch
- github.com/SixLabors/ImageSharp/releases/tag/v4.1.2 Release Notes
Metrics
- CVSS 3.1
-
5.3
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - EPSS — exploit probability
- 0% percentile: 26 · as of 10 November 2026
- CWE
- CWE-789
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