{"id":"CVE-2026-44502","aliases":["GHSA-fp53-qcf8-2xx2","PYSEC-2026-2405"],"url":"https://o3.security/vulnerability/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.","published":"2026-05-26T16:13:32.350Z","modified":"2026-08-07T11:49:32.896106914Z","cvss":{"score":4.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"bugsink","fixedVersion":"2.1.3"}],"fix":{"url":"https://github.com/bugsink/bugsink/commit/940d2df635e06803ef658666d734306942db5cc7","label":"bugsink/bugsink@940d2df"},"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"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T11:49:32.896106914Z"}}