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

Quick assessment

Affected
SixLabors ImageSharp
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

ImageSharp 是一个 2D 图形库。在版本 4.0.0 至 4.1.2 之间，ExrBaseDecompressor.UndoZipCompression 接受非空的 ZIP 或 ZIPS 解压缩结果，该结果短于 EXR 数据块所要求的大小。ZipExrCompression.Decompress 会重建返回的前缀，而 ExrDecoderCore 从通过 Configuration.Default 获取的缓冲区中处理完整的预期数据块，从而导致在先前 ImageSharp 操作中保留的字节可能出现在解码后的

CVSS 5.9 · Medium

Possible ATT&CK Techniques 1 AI

T1564.004 · NTFS File Attributes

Affected Version Matrix 1

VendorProduct Version RangeStatus
SixLabors ImageSharp >= 4.0.0, < 4.1.2 affected
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I. Basic Information for CVE-2026-106111

Vulnerability Information
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Vulnerability Title
ImageSharp: EXR ZIP decoder can expose stale allocator data after a short inflate
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在释放前未清除敏感信息
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
SixLabors ImageSharp >= 4.0.0, < 4.1.2 -

II. Public POCs for CVE-2026-106111

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III. Intelligence Information for CVE-2026-106111

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Other References for CVE-2026-106111 (5)

Same Patch Batch · SixLabors · 2026-10-06 · 9 CVEs total

CVE-2026-106110 7.5 HIGH ImageSharp: TIFF CCITT T4 encoder can write past its compressed output buffer
CVE-2026-106115 7.5 HIGH ImageSharp: TIFF CCITT T6 encoder writes beyond an undersized output buffer
CVE-2026-106112 7.5 HIGH ImageSharp: ICC LUT16 output channel count can write beyond Vector4
CVE-2026-106113 7.5 HIGH ImageSharp: HistogramEqualization uses an unvalidated luminance as an unchecked histogram
CVE-2026-106117 7.5 HIGH ImageSharp: CCITT fax decompression (T4/Modified Huffman): unbounded WriteBits overflows s
CVE-2026-106118 7.5 HIGH ImageSharp: Tiled fax TIFF: tile buffer sized by TileWidth but fax decompressor writes sca
CVE-2026-106114 5.3 MEDIUM ImageSharp: ICC CLUT parsing allocates from unvalidated channel and grid dimensions
CVE-2026-106116 5.3 MEDIUM ImageSharp: BigTIFF IFD count can keep a decoder thread in a non-progressing loop

IV. Related Vulnerabilities

Same product: ImageSharp
Same vendor: SixLabors
Same weakness: CWE-226

V. Comments for CVE-2026-106111

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