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How CVE-2025-64719 Works
The vulnerability exists due to improper input validation in Gogs’ repository and wiki file listing pages when recovering commit information. Specifically, the issue is present in the files `internal/route/repo/wiki.go` and internal/route/repo/view.go, where the pages attempt to recover commit information for files.
In view.go, the problem occurs at line 56, while a slightly different issue occurs in `wiki.go` at line 174, where `commits
` is dereferenced without checking if it contains a value. It is possible to trigger issues in assigning the correct value to the variable `commits` by using a specific string as part of the page . The issue is linked to the fact that file names can contain special characters such as <code>, `?`, `[`, `]`, etc., that will be interpreted as Git's pathspec instead of a simple string. Crafting a name containing an incomplete pathspec sequence will trigger this error. For example, a file named `"[]` will cause the web interface to return an HTTP 500 error when attempting to render the repository or wiki page listing. A remote privileged user can create a specially crafted file or wiki page name to cause a denial of service. The issue affects the web interface for repository or wiki listings and persists as long as the crafted file remains present. The condition will not cause a DoS when using the server via CLI. No public exploit is currently available. <h2 style="color: blue;">DailyCVE Form:</h2> Platform: Gogs Version: All versions (prior to fix) Vulnerability: Improper Input Validation Severity: Low Date: June 19, 2026 <h2 style="color: blue;">Prediction: June 19, 2026</h2> <h2 style="color: blue;">What Undercode Say:</h2> <h2 style="color: blue;">Analytics & Detection:</h2> - Monitor for HTTP 500 errors on repository and wiki listing pages. - Check for the presence of files or wiki pages with names containing special characters like</code>, <code>?</code>, <code>[</code>, <code>]</code>, etc., especially incomplete pathspec sequences. - Audit user activity for the creation of files with suspicious names in repositories and wikis. [bash] Example: Find files with problematic names in a Git repository find /path/to/repo -name "[]" -o -name "]" -o -name "[" -o -name "?" -o -name ""
Example: Check Gogs logs for related errors grep -i "error" /path/to/gogs/log/gogs.log | grep -i "commit" | grep -i "500"
Exploit:
To exploit this vulnerability, an attacker with privileges to create a new file on a repository or wiki page can craft a file name containing an incomplete Git pathspec sequence, such as "[]. Upon creation, the page listing the files will return an HTTP 500 error and render the web interface unusable for that repository or wiki. The denial of service persists as long as the malicious file remains in the repository or wiki.
Protection:
- Update Gogs: Install the security update provided by the vendor.
- Input Validation: Implement proper validation and sanitization of file and page names to prevent the interpretation of special characters as Git pathspec.
- Error Handling: Ensure that errors while recovering commit information do not result in a 500 error and that the application handles such cases gracefully.
- Access Control: Restrict write access to repositories and wikies to trusted users only.
Impact:
A malicious user with rights to create a new file on a repository or wiki page can trigger a denial of service condition. The repository and wiki pages will not render when files named with the payload are present, returning an HTTP error 500 and rendering the web interface unusable. This condition will persist as long as the malicious file is present. The issue will not cause a DoS condition when using the server via CLI.
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Sources:
Reported By: github.com
Extra Source Hub:
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