CVE-2026-44502
Severity CVSS v4.0:
Pending analysis
Type:
CWE-918
Server-Side Request Forgery (SSRF)
Publication date:
26/05/2026
Last modified:
26/05/2026
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.
Impact
Base Score 3.x
4.30
Severity 3.x
MEDIUM