CVE-2026-106118

ImageSharp is a 2D graphics library. From 3.0.0 until 4.1.1, tiled TIFF decoding allocates a destination buffer using TileWidth but TiffDecompressorsFactory.Create constructs T4, T6, and Modified Huffman decompressors using the full frame width. TiffDecoderCore.DecodeTilesChunky can therefore...

CVE-2026-106117 ImageSharp: CCITT fax decompression (T4/Modified Huffman): unbounded WriteBits overflows strip buffer — heap OOB write in SixLabors.ImageSharp

ImageSharp is a 2D graphics library. From 3.0.0 until 4.1.1, decoding a strip TIFF using CCITT Group 3 or Modified Huffman compression can pass attacker-expanded runs to BitWriterUtils.WriteBits without first checking the current row width. T4TiffCompression.WritePixelRun can accumulate oversized...

CVE-2026-106117

The SixLabors.ImageSharp 2D graphics library (versions 3.0.0 through 4.1.1 ) is vulnerable to a heap out-of-bounds (OOB) write during the decoding of strip TIFF images using CCITT Group 3 or Modified Huffman compression. The root cause is that T4TiffCompression.WritePixelRun can accumulate oversi...

EUVD-2026-93560

ImageSharp is a 2D graphics library. From 3.0.0 until 4.1.1, decoding a strip TIFF using CCITT Group 3 or Modified Huffman compression can pass attacker-expanded runs to BitWriterUtils.WriteBits without first checking the current row width. T4TiffCompression.WritePixelRun can accumulate oversized...

CVE-2026-106117 ImageSharp: CCITT fax decompression (T4/Modified Huffman): unbounded WriteBits overflows strip buffer — heap OOB write in SixLabors.ImageSharp

ImageSharp is a 2D graphics library. From 3.0.0 until 4.1.1, decoding a strip TIFF using CCITT Group 3 or Modified Huffman compression can pass attacker-expanded runs to BitWriterUtils.WriteBits without first checking the current row width. T4TiffCompression.WritePixelRun can accumulate oversized...

EUVD-2026-93559

ImageSharp is a 2D graphics library. From 2.0.0 until 4.1.2, ExifReader.ReadValues64 trusts the 64-bit BigTIFF IFD entry count and iterates once per declared entry. When fewer than 20 bytes remain, ExifReader.ReadValue64 returns without advancing the stream or terminating the outer loop, so a sma...

CVE-2026-106116

The ImageSharp 2D graphics library versions 2.0.0 through 4.1.2 are vulnerable to a non-progressing loop when processing malformed BigTIFF files. The root cause is located in ExifReader.ReadValues64 , which trusts the 64-bit BigTIFF IFD entry count and iterates accordingly. When fewer than 20 byt...

CVE-2026-106116 ImageSharp: BigTIFF IFD count can keep a decoder thread in a non-progressing loop

ImageSharp is a 2D graphics library. From 2.0.0 until 4.1.2, ExifReader.ReadValues64 trusts the 64-bit BigTIFF IFD entry count and iterates once per declared entry. When fewer than 20 bytes remain, ExifReader.ReadValue64 returns without advancing the stream or terminating the outer loop, so a sma...

CVE-2026-106116 ImageSharp: BigTIFF IFD count can keep a decoder thread in a non-progressing loop

ImageSharp is a 2D graphics library. From 2.0.0 until 4.1.2, ExifReader.ReadValues64 trusts the 64-bit BigTIFF IFD entry count and iterates once per declared entry. When fewer than 20 bytes remain, ExifReader.ReadValue64 returns without advancing the stream or terminating the outer loop, so a sma...

CVE-2026-106115

The ImageSharp 2D graphics library (versions 2.1.0 through 4.1.2 ) is vulnerable to an out-of-bounds write in the TIFF CCITT Group 4 encoder . The root cause is that T6BitCompressor.CompressStrip can emit encoded row data and end-of-facsimile-block codes exceeding the buffer size allocated by Wid...

CVE-2026-106115 ImageSharp: TIFF CCITT T6 encoder writes beyond an undersized output buffer

ImageSharp is a 2D graphics library. From 2.1.0 until 4.1.2, the TIFF CCITT Group 4 encoder allocates Width times rowsPerStrip bytes even though T6BitCompressor.CompressStrip can emit encoded row data and two 12-bit end-of-facsimile-block codes beyond that capacity. TiffCcittCompressor.WriteCode...

EUVD-2026-93557

ImageSharp is a 2D graphics library. From 2.1.0 until 4.1.2, the TIFF CCITT Group 4 encoder allocates Width times rowsPerStrip bytes even though T6BitCompressor.CompressStrip can emit encoded row data and two 12-bit end-of-facsimile-block codes beyond that capacity. TiffCcittCompressor.WriteCode...

CVE-2026-106114

The ImageSharp 2D graphics library (versions 1.0.0-beta0001 through 4.1.2 ) is vulnerable to a memory allocation issue during ICC CLUT parsing . The root cause is that the library calculates allocation sizes using attacker-declared channel and grid dimensions without first verifying if the profil...

CVE-2026-106114 ImageSharp: ICC CLUT parsing allocates from unvalidated channel and grid dimensions

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...

EUVD-2026-93556

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...

CVE-2026-106113

The ImageSharp 2D graphics library (versions 2.0.0 through 4.1.2 ) is vulnerable to an out-of-bounds access during the decoding of an attacker-supplied 32-bit floating-point TIFF as Image . When HistogramEqualization is applied, ColorNumerics.GetBT709Luminance can produce non-finite or out-of-ran...

CVE-2026-106113 ImageSharp: HistogramEqualization uses an unvalidated luminance as an unchecked histogram index

ImageSharp is a 2D graphics library. From 2.0.0 until 4.1.2, decoding an attacker-supplied 32-bit floating-point TIFF as Image and applying HistogramEqualization can produce a non-finite or out-of-range luminance in ColorNumerics.GetBT709Luminance. GrayscaleLevelsRowOperation.Invoke uses the...

EUVD-2026-93554

ImageSharp is a 2D graphics library. From 2.0.0 until 4.1.2, decoding an attacker-supplied 32-bit floating-point TIFF as Image and applying HistogramEqualization can produce a non-finite or out-of-range luminance in ColorNumerics.GetBT709Luminance. GrayscaleLevelsRowOperation.Invoke uses the...

CVE-2026-106112

The ImageSharp 2D graphics library (versions 4.0.0 through 4.1.2 ) is vulnerable to an out-of-bounds write (CWE-787) during ICC LUT16 conversion. The root cause is that ClutCalculator.Calculate and LutEntryCalculator.CalculateLut use a Vector4 to store intermediate and output values, but the conv...

CVE-2026-106112 ImageSharp: ICC LUT16 output channel count can write beyond Vector4

ImageSharp is a 2D graphics library. From 4.0.0 until 4.1.2, ICC LUT16 conversion accepts more than four output channels even though ClutCalculator.Calculate and LutEntryCalculator.CalculateLut store intermediate and output values in Vector4. When DecoderOptions.ColorProfileHandling is set to...