CVE-2026-44502
Description
Bugsink is a self-hosted error tracking tool. Prior to 2.1.3, Bugsink’s webhook URL validation could be (partially) bypassed because of a mismatch in URL parsing. The original validation logic parsed webhook URLs with Python’s urllib.parse.urlparse, then sent the request with requests.post. For malformed inputs involving backslashes and @, those components can disagree about where the authority ends and which hostname is the real target. A URL may therefore appear to target an allowlisted public hostname during validation, while the HTTP client actually connects to a different host. This vulnerability is fixed in 2.1.3.
How to fix
- bugsink2.1.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| bugsinkPyPI | v < 2.1.3 | 2.1.3 |
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