Cleanuparr up to 2.8.0 Hashing /api/auth/login timing discrepancy

Summaryinfo

A vulnerability described as problematic has been identified in Cleanuparr up to 2.8.0. Impacted is an unknown function of the file /api/auth/login of the component Hashing. The manipulation results in timing discrepancy. This vulnerability was named CVE-2026-32702. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Cleanuparr up to 2.8.0. Affected is an unknown code block of the file /api/auth/login of the component Hashing. The manipulation with an unknown input leads to a timing discrepancy vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality. CVE summarizes:

Cleanuparr is a tool for automating the cleanup of unwanted or blocked files in Sonarr, Radarr, and supported download clients like qBittorrent. From 2.7.0 to 2.8.0, the /api/auth/login endpoint contains a logic flaw that allows unauthenticated remote attackers to enumerate valid usernames by measuring the application's response time. It appears that the hashing function, which is the most time-consuming part of the process by design, occurs as part of the VerifyPassword function. With the short circuits occurring before the hashing function, a timing differential is introduced that exposes validity to the actor. This vulnerability is fixed in 2.8.1.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-32702 since 03/13/2026. The exploitability is told to be difficult. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

Upgrading to version 2.8.1 eliminates this vulnerability.

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Productinfo

Name

• Cleanuparr

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8.0

Website

• Product: https://github.com/Cleanuparr/Cleanuparr/

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