# CVE-2026-87724

## Summary

- **CVE ID:** CVE-2026-87724
- **Severity:** MEDIUM
- **CVSS Score:** 6.5 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H)
- **CWE:** CWE-669
- **Published:** Sep 9, 2026
- **Last Modified:** 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.

## Affected Products

- torprject — Tor (0.4.9.3-alpha)

## References

- [CNA](https://gitlab.torproject.org/tpo/core/tor/-/raw/tor-0.4.9.12/ChangeLog)
- [CNA](https://gitlab.com/torproject/tor/-/commit/10d4b8ffefa7c00aab2b631ed7e7f15e42cd012d)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.26%
- **EPSS Percentile:** 17.7

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-09._