CVE-2026-41571 json
Note Mark: OIDC-registered users authenticated by submitting password "null"
published 2026-04-25 6 mo ago modified 2026-10-26 13 d ago also GHSA-pxf8-6wqm-r6hh , GO-2026-5557 , EUVD-2026-27051
- cvss
- 9.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 30%
- public exploits
- 0
- none known
Summary
Note Mark is an open-source note-taking application. In version 0.19.2, IsPasswordMatch in backend/db/models.go falls back to a hard-coded bcrypt("null") placeholder whenever a user has no stored password. OIDC-registered users are created with an empty password, so anyone who submits password: "null" to the internal login endpoint receives a valid session for that user. The bypass is unauthenticated and requires no user interaction. This issue has been patched in version 0.19.3.
Patch / fix
- go github.com/enchant97/note-mark/backend 0.0.0-20260417132909-dea5530cc989
- govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
opensuse advisories openSUSE-SU-2026:21483-1
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- total
- Assessed
- 6 mo ago
Exploit prediction
0.37% chance of exploitation in the next 30 days, higher than 30% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/enchant97/note-mark/security/advisories/GHSA-pxf8-6wqm-r6hh referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.4 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L |
| GitHub | 3.1 | 9.4 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/enchant97/note-mark/backend | <0.0.0-20260417132909-dea5530cc989 |
0.0.0-20260417132909-dea5530cc989 |
Affected products
- enchant97 note-mark
Classification
- Weakness
-
- CWE-287 Improper Authentication
References
-
github.com
/enchant97/note-mark/commit/dea5530cc9891187b51548ef9f2868b7dc9f4e92
web
-
github.com
/enchant97/note-mark/security/advisories/GHSA-pxf8-6wqm-r6hh
exploit, web, advisory
-
github.com
/enchant97/note-mark/releases/tag/v0.19.3
web
-
nvd.nist.gov
/vuln/detail/CVE-2026-41571
advisory
-
github.com
/enchant97/note-mark
package
Sources
- CVE List CVE-2026-41571
- GitHub Advisory GHSA-pxf8-6wqm-r6hh
- NVD CVE-2026-41571
- OSV GO-2026-5557
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.