CVE-2026-87724
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-669 |
| Vendor | torprject |
| Product | tor |
| Published | Sep 9, 2026 |
| Last Updated | Sep 9, 2026 |
Stay Ahead of the Next One
Get instant alerts for torprject tor
Be the first to know when new medium vulnerabilities affecting torprject tor are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
High
Affected Versions
torprject / Tor
0.4.9.3-alpha < 0.4.9.12