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CVE-2026-33686— Sharp is Vulnerable to Path Traversal via Unsanitized Extension in FileUtil

Quick assessment

Affected
code16 sharp
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

sharp是lovell个人开发者的一款用于将常见格式的大图像转换为更小的、对 Web 友好的 JPEG、PNG、WebP、GIF 和不同尺寸的 AVIF 图像。 Sharp 9.20.0之前版本存在路径遍历漏洞，该漏洞源于FileUtil类中文件扩展名清理不当，可能导致路径遍历。

CVSS 8.8 · High EPSS 0.57% · P46

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2026-33686

Vulnerability Information
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Vulnerability Title
Sharp is Vulnerable to Path Traversal via Unsanitized Extension in FileUtil
Source: CVE Program / CVE List V5
Vulnerability Description
Sharp is a content management framework built for Laravel as a package. Versions prior to 9.20.0 have a path traversal vulnerability in the FileUtil class. The application fails to sanitize file extensions properly, allowing path separators to be passed into the storage layer. In `src/Utils/FileUtil.php`, the `FileUtil::explodeExtension()` function extracts a file's extension by splitting the filename at the last dot. This issue has been patched in version 9.20.0 by properly sanitizing the extension using `pathinfo(PATHINFO_EXTENSION)` instead of `strrpos()`, alongside applying strict regex replacements to both the base name and the extension.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
sharp 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
sharp是lovell个人开发者的一款用于将常见格式的大图像转换为更小的、对 Web 友好的 JPEG、PNG、WebP、GIF 和不同尺寸的 AVIF 图像。 Sharp 9.20.0之前版本存在路径遍历漏洞，该漏洞源于FileUtil类中文件扩展名清理不当，可能导致路径遍历。
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
code16 sharp < 9.20.0 -

II. Public POCs for CVE-2026-33686

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III. Intelligence Information for CVE-2026-33686

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Patches & Fixes for CVE-2026-33686 (1)

Vendor Advisories for CVE-2026-33686 (1)

IV. Related Vulnerabilities

Same product: sharp
Same vendor: code16
Same weakness: CWE-22

V. Comments for CVE-2026-33686

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