Description
Tor before 0.4.9.12 interprets the CC_RESPONSE extension even when CC_REQUEST was not sent, which allows remote attackers to cause a denial of service (crash) because of corrupted congestion-control state. This is TROVE-2026-032.
Published: 2026-09-09
Score: 6.5 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Wed, 09 Sep 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 09 Sep 2026 04:45:00 +0000

Type Values Removed Values Added
Title Tor Pre‑0.4.9.12 Unchecked CC_RESPONSE Causes Denial of Service

Wed, 09 Sep 2026 01:45:00 +0000

Type Values Removed Values Added
Description Tor before 0.4.9.12 interprets the CC_RESPONSE extension even when CC_REQUEST was not sent, which allows remote attackers to cause a denial of service (crash) because of corrupted congestion-control state. This is TROVE-2026-032.
Weaknesses CWE-669
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H'}

Subscriptions

No data.

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-09-09T18:18:39.270Z

Reserved: 2026-09-09T01:29:45.866Z

Link: CVE-2026-87724

cve-icon Vulnrichment

Updated: 2026-09-09T18:18:32.815Z

cve-icon NVD

Status : Deferred

Published: 2026-09-09T02:16:57.670

Modified: 2026-09-09T19:17:50.287

Link: CVE-2026-87724

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-09T04:30:05Z

Weaknesses