# CVE-2026-41571: Note Mark: OIDC-registered users authenticated by submitting password "null"

Source: https://junglewise.ai/threats/cve-2026-41571-note-mark-oidc-registered-users-authenticated-by-submitting  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-05-04  
License: CC BY 4.0 with a link back

CVE-2026-41571 · Severity: critical · CVSS 9.4 · Published 2026-05-04

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.

Technologies: [github.com/enchant97/note-mark/backend (Go)](https://junglewise.ai/threats/technologies/github-com-enchant97-note-mark-backend). Vendors: [Go](https://junglewise.ai/threats/vendors/go).

## Quick answers

**Is CVE-2026-41571 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-41571 being exploited in the wild.

**How severe is CVE-2026-41571?** Critical severity, with a CVSS score of 9.4, published 4 May 2026.

**Which products and versions are affected?** github.com/enchant97/note-mark/backend (Go) SEMVER:introduced=0,fixed=0.0.0-20260417132909-dea5530cc989.

**Is there a fix for CVE-2026-41571?** Yes. github.com/enchant97/note-mark/backend (Go): upgrade to 0.0.0-20260417132909-dea5530cc989 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2026-41571?** Check whether you run github.com/enchant97/note-mark/backend (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- github.com/enchant97/note-mark/backend (Go): upgrade to 0.0.0-20260417132909-dea5530cc989 or later

  ```sh
  go get github.com/enchant97/note-mark/backend@v0.0.0-20260417132909-dea5530cc989
  ```


## Affected products

- github.com/enchant97/note-mark/backend (Go) SEMVER:introduced=0,fixed=0.0.0-20260417132909-dea5530cc989

## Identifiers

- CVE-2026-41571
- GHSA-pxf8-6wqm-r6hh
- GO-2026-5557

## Related threats

- [Note Mark path traversal in migrate export via unsanitized slugs](https://junglewise.ai/threats/cve-2026-50553-note-mark-path-traversal-in-migrate-export-via-unsanitized-slugs)
- [Note Mark information disclosure of soft-deleted notes in public books](https://junglewise.ai/threats/cve-2026-50554-note-mark-information-disclosure-of-soft-deleted-notes-in-public)
- [enchant97 Note Mark weak JWT secret allows account takeover](https://junglewise.ai/threats/cve-2026-44523-enchant97-note-mark-weak-jwt-secret-allows-account-takeover)
- [enchant97 Note Mark path traversal in asset upload](https://junglewise.ai/threats/cve-2026-44522-enchant97-note-mark-path-traversal-in-asset-upload)
- [Note Mark: Unauthenticated read of notes and assets in soft-deleted public books](https://junglewise.ai/threats/cve-2026-41572-note-mark-unauthenticated-read-of-notes-and-assets-in-soft)