CVE-2026-61854 (GCVE-0-2026-61854)

Vulnerability from cvelistv5 – Published: 2026-10-30 18:25 – Updated: 2026-10-30 18:25
VLAI
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_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.
Severity
8.2 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
CWE
  • CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
  • CWE-400 - Uncontrolled Resource Consumption
  • CWE-667 - Improper Locking
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7993 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
jackh54 VoiceSentinel Affected: >= 2.2.1, < 3.3.1
guessed Create a notification for this product.
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{
  "containers": {
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          "vendor": "jackh54",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 2.2.1, \u003c 3.3.1"
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          "lang": "en",
          "value": "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_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."
        }
      ],
      "metrics": [
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            "baseScore": 8.2,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H",
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            }
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        {
          "descriptions": [
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              "lang": "en",
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        },
        {
          "descriptions": [
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              "description": "CWE-667: Improper Locking",
              "lang": "en",
              "type": "CWE"
            }
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-30T18:25:28.484Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
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          "name": "https://github.com/jackh54/VoiceSentinel/security/advisories/GHSA-vhqx-3242-77j7",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/jackh54/VoiceSentinel/security/advisories/GHSA-vhqx-3242-77j7"
        },
        {
          "name": "https://github.com/jackh54/VoiceSentinel/commit/a8c9f926d19969a19d05eee2a508719aea7f109c",
          "tags": [
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          "url": "https://github.com/jackh54/VoiceSentinel/commit/a8c9f926d19969a19d05eee2a508719aea7f109c"
        },
        {
          "name": "https://github.com/jackh54/VoiceSentinel/releases/tag/v3.3.1",
          "tags": [
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          "url": "https://github.com/jackh54/VoiceSentinel/releases/tag/v3.3.1"
        }
      ],
      "source": {
        "advisory": "GHSA-vhqx-3242-77j7",
        "discovery": "UNKNOWN"
      },
      "title": "VoiceSentinel: Race condition in report buffer cleanup can corrupt transcript data and cause unbounded disk growth"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-61854",
    "datePublished": "2026-10-30T18:25:28.484Z",
    "dateReserved": "2026-07-10T20:28:17.513Z",
    "dateUpdated": "2026-10-30T18:25:28.484Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "date": "2026-11-07",
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      "percentile": "0.15594"
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                "product": "VoiceSentinel",
                "vendor": "jackh54",
                "versions": [
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                    "version": "\u003e= 2.2.1, \u003c 3.3.1"
                  }
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            ],
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        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "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_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."
          }
        ],
        "id": "CVE-2026-61854",
        "lastModified": "2026-10-30T19:39:14.897",
        "metrics": {
          "cvssMetricV31": [
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              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
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                "scope": "UNCHANGED",
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                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H",
                "version": "3.1"
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              "source": "security-advisories@github.com",
              "type": "Secondary"
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        "published": "2026-10-30T19:18:28.887",
        "references": [
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            "url": "https://github.com/jackh54/VoiceSentinel/commit/a8c9f926d19969a19d05eee2a508719aea7f109c"
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            "url": "https://github.com/jackh54/VoiceSentinel/releases/tag/v3.3.1"
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            "source": "security-advisories@github.com",
            "url": "https://github.com/jackh54/VoiceSentinel/security/advisories/GHSA-vhqx-3242-77j7"
          }
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        "vulnStatus": "Deferred",
        "weaknesses": [
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            "source": "security-advisories@github.com",
            "type": "Primary"
          }
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      }
    }
  }
}



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