Vulnerability 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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/bugsink/bugsink/commit/940d2df635e06803ef658666d734306942db5c
- https://github.com/bugsink/bugsink/releases/tag/2.1.3
- https://github.com/bugsink/bugsink/security/advisories/GHSA-fp53-qcf8-2xx2
FAQ
What is CVE-2026-44502?
CVE-2026-44502 is a vulnerability with a CVSS score of 4.3 (MEDIUM). 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 ...
How severe is CVE-2026-44502?
CVE-2026-44502 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-44502?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.