TI-2025-20408 Aliases CVE-2025-27598 GHSA-2cmq-823j-5qj8

Out-of-bounds Write in SixLabors ImageSharp

HIGH 72CWE-787Published 2025-03-06 · Updated 2025-03-07

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-787 and the CVSS impact.

Summary

ImageSharp is a 2D graphics API. An Out-of-bounds Write vulnerability has been found in the ImageSharp gif decoder, allowing attackers to cause a crash using a specially crafted gif. This can potentially lead to denial of service. The problem has been patched. All users are advised to upgrade to v3.1.7 or v2.1.10.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.0057 47th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed ImageSharp (SixLabors): 2.1.10, 3.1.7SixLabors.ImageSharp (NuGet): 3.1.7, 2.1.10

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
SixLabors	ImageSharp	before 2.1.10; 3.0.0 to before 3.1.7	2.1.10, 3.1.7	Patch available	CNA
—	SixLabors.ImageSharp (NuGet)	3.0.0 to before 3.1.7	3.1.7	Patch available	GHSA-2cmq-823j-5qj8
—	SixLabors.ImageSharp (NuGet)	before 2.1.10	2.1.10	Patch available	GHSA-2cmq-823j-5qj8

ImageSharp VendorSixLabors Affected before 2.1.10; 3.0.0 to before 3.1.7 Fixed in 2.1.10, 3.1.7 Patch available CNA
SixLabors.ImageSharp (NuGet) Vendor— Affected 3.0.0 to before 3.1.7 Fixed in 3.1.7 Patch available GHSA-2cmq-823j-5qj8
SixLabors.ImageSharp (NuGet) Vendor— Affected before 2.1.10 Fixed in 2.1.10 Patch available GHSA-2cmq-823j-5qj8

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:sixlabors:imagesharp::::::::	before 2.1.10; 3.0.0 to before 3.1.7	Vulnerable	SixLabors

cpe:2.3:a:sixlabors:imagesharp:*:*:*:*:*:*:*:* Versions before 2.1.10; 3.0.0 to before 3.1.7 Vulnerable ·SixLabors

Remediation

Fix · CNA ImageSharp (SixLabors) Fixed in 2.1.10, 3.1.7
Fix · GHSA-2cmq-823j-5qj8 SixLabors.ImageSharp (NuGet) Fixed in 3.1.7 Advisory →
Fix · GHSA-2cmq-823j-5qj8 SixLabors.ImageSharp (NuGet) Fixed in 2.1.10 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2025-27598
2026-10-03 Alias added: GHSA-2cmq-823j-5qj8

References

Exploit 1

https://github.com/SixLabors/ImageSharp/issues/2859

Patch 1

https://github.com/SixLabors/ImageSharp/pull/2890

Advisory 2

Other 1

https://github.com/SixLabors/ImageSharp

TI-2026-68636 Out-of-bounds write in ImageSharp CCITT fax decompression CVSS 3.1HIGH 7.5
TI-2026-68634 Out-of-bounds write in ImageSharp TIFF CCITT Group 4 encoder CVSS 3.1HIGH 7.5
TI-2026-68629 Out-of-bounds write in ImageSharp TIFF CCITT encoder CVSS 3.1HIGH 7.5
TI-2026-68635 ImageSharp BigTIFF IFD count can keep a decoder thread in a non-progressing loop CVSS 3.1MEDIUM 5.3
TI-2026-68633 Excessive memory allocation in ImageSharp ICC CLUT parsing CVSS 3.1MEDIUM 5.3
TI-2026-68630 Stale buffer data disclosure in ImageSharp EXR ZIP decoding CVSS 3.1MEDIUM 5.9

See all 13 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences