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Vulnerability · Published Oct 6, 2026 · Assigned by GitHub_M

CVE-2026-106111ImageSharp: EXR ZIP decoder can expose stale allocator data after a short inflate

Medium 5.9

In plain English

A medium-severity security flaw in ImageSharp from SixLabors. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 21% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.9Medium
Exploit odds (30 days)0.3%top 79.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official description

ImageSharp 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
NuGetsixlabors.imagesharp4.1.2GHSA-4q3p-rj5x-xv7p

Affected products (as reported)

VendorProductVersions
SixLabors ImageSharp >= 4.0.0, < 4.1.2

Weakness: CWE-226 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

References