Vulnerability Description
OpenBullet2 through version 0.3.2 on Windows contains a credential disclosure vulnerability that allows remote attackers to capture the NTLMv2 hash of the process user by configuring a job proxy source with a UNC path pointing to an attacker-controlled server. When the job starts, the application attempts to load proxies from the UNC path, triggering an SMB authentication attempt that discloses the NTLMv2 hash, which can then be relayed or cracked offline.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://hackernoon.com/one-empty-header-to-admin-how-an-auth-bypass-breaks-openb
- https://www.vulncheck.com/advisories/openbullet2-ntlmv2-hash-disclosure-via-unc-
FAQ
What is CVE-2026-39908?
CVE-2026-39908 is a vulnerability with a CVSS score of 6.5 (MEDIUM). OpenBullet2 through version 0.3.2 on Windows contains a credential disclosure vulnerability that allows remote attackers to capture the NTLMv2 hash of the process user by configuring a job proxy sourc...
How severe is CVE-2026-39908?
CVE-2026-39908 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-39908?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.