CVE-2025-27598

Out-of-bounds Write in SixLabors ImageSharp

7.5 HighFix available

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

0.57%Up 0.5 points since Mar 7, 2025

What each source reports

CVE List Score used 7.5

Out-of-bounds Write in SixLabors ImageSharp

Record: CVE-2025-27598
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-787
Updated: 2026-11-02

EUVDEUVD-2025-6253 7.5

Record: EUVD-2025-6253
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-2cmq-823j-5qj8 7.5

Out-of-bounds Write in SixLabors ImageSharp

Impact

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.

Patches

The problem has been patched. All users are advised to upgrade to v3.1.7 or v2.1.10.

Workarounds

None.

References

https://github.com/SixLabors/ImageSharp/issues/2859 https://github.com/SixLabors/ImageSharp/issues/2890

Record: GHSA-2cmq-823j-5qj8
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-787
Updated: 2026-11-02

NVD 7.5

Record: CVE-2025-27598
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-787
Updated: 2026-11-02

OSV 7.5

Out-of-bounds Write in SixLabors ImageSharp

Record: CVE-2025-27598
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-787
Updated: 2026-11-02

OSVGHSA-2cmq-823j-5qj8 7.5

Out-of-bounds Write in SixLabors ImageSharp

Impact

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.

Patches

The problem has been patched. All users are advised to upgrade to v3.1.7 or v2.1.10.

Workarounds

None.

References

https://github.com/SixLabors/ImageSharp/issues/2859 https://github.com/SixLabors/ImageSharp/issues/2890

Record: GHSA-2cmq-823j-5qj8
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-787
Updated: 2026-11-02

Affected products

sixlabors imagesharp

Affected packages

Affected packages
Package	Affected	Fixed
`SixLabors.ImageSharp` NuGet	3.0.0 up to 3.1.7	3.1.7
`SixLabors.ImageSharp` NuGet	before 2.1.10	2.1.10
`SixLabors.ImageSharp` NuGet	3.0.0 up to 3.1.7, plus listed versions 3.0.13.0.23.1.03.1.13.1.2 Show 4 moreShow less 3.1.33.1.43.1.53.1.6	3.1.7
`SixLabors.ImageSharp` NuGet	before 2.1.10, plus listed versions 1.0.01.0.0-beta00011.0.0-beta00021.0.0-beta00031.0.0-beta0004 Show 21 moreShow less 1.0.0-beta00051.0.0-beta00061.0.0-beta00071.0.0-rc00011.0.0-rc00021.0.0-rc00031.0.11.0.21.0.31.0.42.0.02.1.02.1.12.1.22.1.32.1.42.1.52.1.62.1.72.1.82.1.9	2.1.10

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-27598 is a high vulnerability (CVSS 7.5) in Sixlabors Imagesharp, published March 6, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.57%, the 47th percentile. Fixed in SixLabors.ImageSharp 3.1.7.