CVE-2026-44502

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 v3 4.3 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/bugsink/bugsink/commit/940d2df635e06803ef658666d734306942db5cc7
https://github.com/bugsink/bugsink/releases/tag/2.1.3
https://github.com/bugsink/bugsink/security/advisories/GHSA-fp53-qcf8-2xx2

Configurations

No configuration.

History

26 May 2026, 17:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-26 17:16

Updated : 2026-06-17 10:50

NVD link : CVE-2026-44502

Mitre link : CVE-2026-44502

CVE.ORG link : CVE-2026-44502

JSON object : View

Products Affected

No product.

CWE

CWE-918

Server-Side Request Forgery (SSRF)

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