Vulnerability · Published Mar 26, 2026 · Assigned by GitHub_M
CVE-2026-33686Sharp is Vulnerable to Path Traversal via Unsanitized Extension in FileUtil
High 8.8
In plain English
A high-severity path traversal in sharp from code16. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 47% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Packagist | code16/sharp | 9.20.0 | GHSA-9ffq-6457-8958 |
Affected products (as reported)
Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
- https://github.com/code16/sharp/security/advisories/GHSA-9ffq-6457-8958 x_refsource_CONFIRM
- https://github.com/code16/sharp/pull/715 x_refsource_MISC