CVE-2026-32702 Cleanuparr has Username Enumeration via Timing Attack
Unauthenticated attackers can enumerate valid usernames in Cleanuparr by measuring response time differences during login attempts.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-32702?
CVE-2026-32702 is a medium-severity vulnerability in Cleanuparr, published on 13 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-208
Which versions are affected by CVE-2026-32702?
It affects 1 product.
Products include Cleanuparr Project Cleanuparr.
How do I fix CVE-2026-32702?
No fix has been published for CVE-2026-32702 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-32702 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-32702 exists.
Sources
Also known as GHSA-gjmf-m27r-2c9v.