Arbitrary File Upload Affecting gitea.dev/routers/web/repo package, versions <1.27.0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-GOLANG-GITEADEVROUTERSWEBREPO-18601979
- published10 Aug 2026
- disclosed21 Jul 2026
- creditUnknown
Introduced: 21 Jul 2026
CVE-2026-58428 Â (opens in a new tab)How to fix?
Upgrade gitea.dev/routers/web/repo to version 1.27.0 or higher.
Overview
Affected versions of this package are vulnerable to Arbitrary File Upload through the web release edit process. An attacker can bypass configured file extension restrictions by renaming existing release attachments to forbidden extensions via the web interface, allowing the distribution of files with disallowed types. This may enable the upload and serving of potentially malicious files or files that could trigger unintended behavior in clients or browsers. This is only exploitable if the repository has a non-empty allowlist for allowed attachment types and the attacker has write permissions to the repository.
Workaround
This vulnerability can be mitigated by removing the release attachment allowlist, restricting write permissions on affected repositories, or deploying a reverse proxy to filter suspicious form fields.