CVE-2025-71377: Stoatchat

High severity, CVSS 8.7. EPSS: 0.7% chance of exploitation in the next 30 days.

stoatchat (delta) versions before 20250210-1 (0.8.2) contain a logic error in the query messages route. When fetching messages 'nearby' another message, the database query can be given a message limit of zero, which the database interprets as 'no limit'. A remote unauthenticated attacker can craft nearby message fetch requests to download an entire channel's message history in a single expensive request, and can send many such requests in parallel, resulting in denial of service through resource exhaustion.

Affected products

• Stoatchat Stoatchat: before 0.8.2 (fixed in 0.8.2)

Published 2026-07-16. Last modified 2026-10-06.