CVE-2026-87724

State: Published
Severity: 6.5 Medium
Published: Sep 9, 2026
Updated: Sep 9, 2026
Reserved: Sep 9, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H	mitre

Weaknesses

CWE-669 Incorrect Resource Transfer Between Spheres

Affected Products

Product	Versions
Tortorprject	0.4.9.3-alpha to before 0.4.9.12Affected

References

https://gitlab.torproject.org/tpo/core/tor/-/raw/tor-0.4.9.12/ChangeLog
https://gitlab.com/torproject/tor/-/commit/10d4b8ffefa7c00aab2b631ed7e7f15e42cd012d

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