CVE-2026-40263Note Mark: Username Enumeration via Login Endpoint Timing Side-Channel
Updated under an hour ago ()
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It affects enchant97 note-mark. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Free account, 1 product
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
- 3.7 LOW (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
- Weakness (CWE)
- CWE-208
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Deferred
- Record last updated
- Apr 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
enchant97 note-mark enchant97:note_mark (from the name) | before 0.19.2 | CNA record |
References
- https://github.com/enchant97/note-mark/security/advisories/GHSA-w6m9-39cv-2fwpx-refsource-confirm
- https://github.com/enchant97/note-mark/commit/cf4c6f6acf70b569d80396d323b067c00d45c034x-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.