Vulnerability Description
Note Mark is an open-source note-taking application. In versions 0.19.1 and prior, the login endpoint performs bcrypt password verification only when the supplied username exists, returning immediately for nonexistent usernames. This timing discrepancy allows unauthenticated attackers to enumerate valid usernames by measuring response times, enabling targeted credential attacks. This issue has been fixed in version 0.19.2.
CVSS Score
LOW
Related Weaknesses (CWE)
References
- https://github.com/enchant97/note-mark/commit/cf4c6f6acf70b569d80396d323b067c00d
- https://github.com/enchant97/note-mark/security/advisories/GHSA-w6m9-39cv-2fwp
- https://github.com/enchant97/note-mark/security/advisories/GHSA-w6m9-39cv-2fwp
FAQ
What is CVE-2026-40263?
CVE-2026-40263 is a vulnerability with a CVSS score of 3.7 (LOW). Note Mark is an open-source note-taking application. In versions 0.19.1 and prior, the login endpoint performs bcrypt password verification only when the supplied username exists, returning immediatel...
How severe is CVE-2026-40263?
CVE-2026-40263 has been rated LOW with a CVSS base score of 3.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-40263?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.