enchant97 note-mark up to 0.19.1 Login Endpoint timing discrepancy

Summaryinfo

A vulnerability categorized as problematic has been discovered in enchant97 note-mark up to 0.19.1. Affected by this issue is some unknown functionality of the component Login Endpoint. Such manipulation leads to timing discrepancy. This vulnerability is traded as CVE-2026-40263. The attack may be launched remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in enchant97 note-mark up to 0.19.1. It has been rated as problematic. Affected by this issue is an unknown functionality of the component Login Endpoint. The manipulation with an unknown input leads to a timing discrepancy vulnerability. Using CWE to declare the problem leads to CWE-208. Two separate operations in a product require different amounts of time to complete, in a way that is observable to an actor and reveals security-relevant information about the state of the product, such as whether a particular operation was successful or not. Impacted is confidentiality. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-40263 since 04/10/2026. The exploitation is known to be difficult. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1592 by the MITRE ATT&CK project.

Upgrading to version 0.19.2 eliminates this vulnerability. Applying the patch cf4c6f6acf70b569d80396d323b067c00d45c034 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Vendor

• enchant97

Name

• note-mark

Version

• 0.19.0
• 0.19.1

License

• open-source

Website

• Product: https://github.com/enchant97/note-mark/

CPE 2.3info

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CPE 2.2info

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