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CVE-2025-27598— Out-of-bounds Write in SixLabors ImageSharp

Quick assessment

Affected
SixLabors ImageSharp
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

ImageSharp是Six Labors开源的一款全新的、功能齐全、管理全面、跨平台的二维图形 API。 ImageSharp v3.1.7和v2.1.10之前版本存在缓冲区错误漏洞，该漏洞源于gif解码器存在越界写入漏洞，可能导致崩溃或拒绝服务。

CVSS 7.5 · High EPSS 0.57% · P47

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2025-27598

Vulnerability Information
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Vulnerability Title
Out-of-bounds Write in SixLabors ImageSharp
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Vulnerability Title
ImageSharp 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ImageSharp是Six Labors开源的一款全新的、功能齐全、管理全面、跨平台的二维图形 API。 ImageSharp v3.1.7和v2.1.10之前版本存在缓冲区错误漏洞，该漏洞源于gif解码器存在越界写入漏洞，可能导致崩溃或拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
SixLabors ImageSharp < 2.1.10 -

II. Public POCs for CVE-2025-27598

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 9777 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
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POC zip download
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III. Intelligence Information for CVE-2025-27598

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Patches & Fixes for CVE-2025-27598 (1)

Vendor Advisories for CVE-2025-27598 (1)

Other References for CVE-2025-27598 (1)

IV. Related Vulnerabilities

Same product: ImageSharp
Same vendor: SixLabors
Same weakness: CWE-787