{"id":"CVE-2026-61854","title":"VoiceSentinel: Race condition in report buffer cleanup can corrupt transcript data and cause unbounded disk growth","summary":"VoiceSentinel is a real-time voice moderation system for Minecraft servers. From 2.2.1 until 3.3.1, the optional report buffer feature has a race between retention cleanup and normal transcript writes. In `report_buffer.py`, `_maybe_clea…","severity":"high","cvss":8.2,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","cvssSource":"cna","cwe":["CWE-362","CWE-400","CWE-667"],"vendor":"jackh54","product":"VoiceSentinel","affected":["VoiceSentinel >= 2.2.1, < 3.3.1"],"published":"2026-10-30","updated":"2026-10-30","sourceUpdated":"2026-10-30T18:25:28.484Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-61854","references":[{"url":"https://github.com/jackh54/VoiceSentinel/security/advisories/GHSA-vhqx-3242-77j7","label":"https://github.com/jackh54/VoiceSentinel/security/advisories/GHSA-vhqx-3242-77j7"},{"url":"https://github.com/jackh54/VoiceSentinel/commit/a8c9f926d19969a19d05eee2a508719aea7f109c","label":"https://github.com/jackh54/VoiceSentinel/commit/a8c9f926d19969a19d05eee2a508719aea7f109c"},{"url":"https://github.com/jackh54/VoiceSentinel/releases/tag/v3.3.1","label":"https://github.com/jackh54/VoiceSentinel/releases/tag/v3.3.1"}],"tags":["cve.org"],"epss":0.00243,"epssPercentile":0.15594,"ingestedAt":"2026-11-05T16:24:31.321Z","slug":"CVE-2026-61854","body":"## Overview\n\nVoiceSentinel is a real-time voice moderation system for Minecraft servers. From 2.2.1 until 3.3.1, the optional report buffer feature has a race between retention cleanup and normal transcript writes. In `report_buffer.py`, `_maybe_cleanup()` uses an unlocked dictionary for once-per-hour cleanup throttling, allowing simultaneous `_cleanup_tenant()` operations for one tenant. Cleanup reads `transcripts.jsonl` and rewrites it in place without file locking or atomic replacement, while `report_buffer_append_async` uses `asyncio.to_thread` to append without synchronization. In `main.py`, concurrent `_processing_worker` tasks make this reachable in normal operation; `processing.worker_count` of two or more and public-pool servers sharing a `server_key` increase collisions. With `report_buffer.enabled` set to true, racing writes can lose, duplicate or corrupt transcript data and defeat `report_buffer.retention_seconds` pruning, allowing unbounded disk growth that can exhaust storage and crash the host or other services sharing it. The feature is opt-in and disabled by default. This issue is fixed in version 3.3.1.\n\n## Affected\n\n- `VoiceSentinel >= 2.2.1, < 3.3.1`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":45.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}