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 performs unchecked writes, and a decode-and-re-encode flow can inherit TiffCompression.CcittGroup4Fax and one-bit metadata from attacker-supplied input. The resulting out-of-bounds writes can corrupt memory and terminate the process. This issue is fixed in version 4.1.2.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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 performs unchecked
    writes, and a decode-and-re-encode flow can inherit TiffCompression.CcittGroup4Fax and one-bit metadata
    from attacker-supplied input. The resulting out-of-bounds writes can corrupt memory and terminate the
    process. This issue is fixed in version 4.1.2. (CVE-2026-106115)

ID	Name	Product	Family	Type	Severity
474113	Echo: SixLabors.ImageSharp, sixlabors.imagesharp: security update to 4.1.2	Tenable Cloud Security	Echo Local Security Checks	Local	high
474113	Echo: SixLabors.ImageSharp, sixlabors.imagesharp: security update to 4.1.2	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	high
473785	SCA: security update for SixLabors.ImageSharp (GHSA-jjfr-hcj7-qf5w)	Tenable Cloud Security	SCA Checks	Local	high
473785	SCA: security update for SixLabors.ImageSharp (GHSA-jjfr-hcj7-qf5w)	Tenable Self-Hosted Container Security	SCA Checks	Local	high

Detections

Analytics

CVE-2026-106115

high

Tenable Plugins

high

high

high

high