ImageSharp: EXR ZIP decoder can expose stale allocator data after a short inflate

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-106111
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-06 18:16:52 UTC
Updated2026-10-06 20:03:40 UTC
DescriptionImageSharp is a 2D graphics library. From 4.0.0 until 4.1.2, ExrBaseDecompressor.UndoZipCompression accepts a nonempty ZIP or ZIPS inflate result that is shorter than the EXR block's required size. ZipExrCompression.Decompress reconstructs the returned prefix while ExrDecoderCore processes the full expected block from a buffer obtained through Configuration.Default, allowing bytes retained from a completed prior ImageSharp operation to appear in decoded pixels. Applications that expose pixels or output from the later attacker-controlled EXR decode can disclose process-local image data. This issue is fixed in version 4.1.2.

Risk And Classification

Primary CVSS: v3.1 5.9 MEDIUM from [email protected]

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

Problem Types: CWE-226 | CWE-226 CWE-226: Sensitive Information in Resource Not Removed Before Reuse

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.9MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
3.1CNADECLARED5.9MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA SixLabors ImageSharp affected >= 4.0.0, < 4.1.2 Not specified

References

ReferenceSourceLinkTags
github.com/SixLabors/ImageSharp/commit/6ed2a275217d39301e76df42acec2a953... [email protected] github.com
github.com/SixLabors/ImageSharp/security/advisories/GHSA-4q3p-rj5x-xv7p 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/SixLabors/ImageSharp/pull/3187 [email protected] github.com
github.com/SixLabors/ImageSharp/releases/tag/v4.1.2 [email protected] github.com
github.com/SixLabors/ImageSharp/commit/3c43cf583fdd98eff0f451397affaa31c... [email protected] github.com
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