What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-10-06 · updated 2026-10-24
• Weakness: CWE-226

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 products

• SixLabors ImageSharp: from 4.0.0 before 4.1.2 — fixed in 4.1.2

How to fix

Upgrade to a fixed version: SixLabors ImageSharp 4.1.2. Check the vendor advisory for mitigations.

References

• https://github.com/SixLabors/ImageSharp/commit/3c43cf583fdd98eff0f451397affaa31c6a2e6b1
• https://github.com/SixLabors/ImageSharp/commit/6ed2a275217d39301e76df42acec2a9533b39d2b
• https://github.com/SixLabors/ImageSharp/pull/3187
• https://github.com/SixLabors/ImageSharp/releases/tag/v4.1.2
• https://github.com/SixLabors/ImageSharp/security/advisories/GHSA-4q3p-rj5x-xv7p
• https://github.com/SixLabors/ImageSharp/security/advisories/GHSA-4q3p-rj5x-xv7p

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