ImageSharp is a 2D graphics library. From 2.0.0 until 4.1.2, the TIFF CCITT Group 3 encoder allocates an undersized compressed-data buffer for narrow 1-bit images. TiffCcittCompressor.Initialize does not reserve enough space for the row data and T4 end-of-line codes, and T4BitCompressor.CompressStrip reaches unchecked writes when TiffCompression.CcittGroup3Fax is selected directly or inherited from decoded TIFF metadata. An attacker-controlled encode or decode-and-re-encode flow can write beyond the logical output span, corrupt process memory, and terminate the process. This issue is fixed in version 4.1.2.
History

Sat, 24 Oct 2026 02:00:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:sixlabors:imagesharp:*:*:*:*:*:*:*:*

Fri, 09 Oct 2026 02:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 07 Oct 2026 06:15:00 +0000

Type Values Removed Values Added
First Time appeared Sixlabors
Sixlabors imagesharp
Vendors & Products Sixlabors
Sixlabors imagesharp

Tue, 06 Oct 2026 17:45:00 +0000

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Description ImageSharp is a 2D graphics library. From 2.0.0 until 4.1.2, the TIFF CCITT Group 3 encoder allocates an undersized compressed-data buffer for narrow 1-bit images. TiffCcittCompressor.Initialize does not reserve enough space for the row data and T4 end-of-line codes, and T4BitCompressor.CompressStrip reaches unchecked writes when TiffCompression.CcittGroup3Fax is selected directly or inherited from decoded TIFF metadata. An attacker-controlled encode or decode-and-re-encode flow can write beyond the logical output span, corrupt process memory, and terminate the process. This issue is fixed in version 4.1.2.
Title ImageSharp: TIFF CCITT T4 encoder can write past its compressed output buffer
Weaknesses CWE-787
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-10-06T17:42:02.099Z

Updated: 2026-10-09T01:19:50.868Z

Reserved: 2026-10-06T15:33:55.333Z

Link: CVE-2026-106110

cve-icon Vulnrichment

Updated: 2026-10-09T01:19:45.535Z

cve-icon NVD

Status : Analyzed

Published: 2026-10-06T18:16:52.490

Modified: 2026-10-24T01:42:13.327

Link: CVE-2026-106110

cve-icon Redhat

No data.