{"id":"CVE-2026-44502","summary":"Bugsink: SSRF bypass in `validate_webhook_url`","details":"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.","aliases":["GHSA-fp53-qcf8-2xx2"],"modified":"2026-07-08T08:13:27.914644325Z","published":"2026-05-26T16:13:32.350Z","database_specific":{"cwe_ids":["CWE-918"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44502.json","cna_assigner":"GitHub_M"},"references":[{"type":"WEB","url":"https://github.com/bugsink/bugsink/releases/tag/2.1.3"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44502.json"},{"type":"ADVISORY","url":"https://github.com/bugsink/bugsink/security/advisories/GHSA-fp53-qcf8-2xx2"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-44502"},{"type":"FIX","url":"https://github.com/bugsink/bugsink/commit/940d2df635e06803ef658666d734306942db5cc7"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/bugsink/bugsink","events":[{"introduced":"0"},{"fixed":"940d2df635e06803ef658666d734306942db5cc7"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"2.1.3"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["2.1.2","2.1.1","2.1.0","2.0.14","2.0.13","2.0.12","2.0.11","2.0.10","2.0.9","2.0.8","2.0.7","2.0.6","2.0.5","2.0.4","2.0.3","2.0.2","2.0.0","2.0.1","2.0.0a1","1.7.6","1.7.5","1.4.2","1.5.4","1.6.3","1.7.3","1.7.2","1.7.1","1.7.0","1.6.2","1.6.1","1.6.0","1.5.3","1.5.2","1.5.1","1.5.0","1.4.1","1.4.0","1.3.0","1.2.0","1.1.2","1.1.1","1.1.0","1.0.1","1.0.0","0.1.20","0.1.19","0.1.18","0.1.17","0.1.16","0.1.15","0.1.14","0.1.13","0.1.12","0.1.11","0.1.10","0.1.9","0.1.8","0.1.7","0.1.6","0.1.5","0.1.4","0.1.3","0.1.2","0.1.1","0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44502.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"}]}