# CVE-2026-77584

## Summary

- **CVE ID:** CVE-2026-77584
- **Severity:** HIGH
- **CVSS Score:** 7 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L)
- **CWE:** CWE-821
- **Published:** Aug 20, 2026
- **Last Modified:** Aug 25, 2026

## Description

Tor before 0.4.9.10 did not reject a CONFLUX_LINK cell that arrives on a circuit which already has attached streams. A malicious client could send a RELAY_COMMAND_BEGIN before the CONFLUX_LINK on the same circuit, attaching an exit stream that would later end up orphan leaving a dangling circuit back-pointer and a use-after-free (UAF) when the circuit is freed. This is TROVE-2026-025.

## Affected Products

- torproject — Tor (0.4.8.1-alpha)

## References

- [CNA](https://gitlab.torproject.org/tpo/core/tor/-/raw/tor-0.4.9.10/ChangeLog)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.18%
- **EPSS Percentile:** 7.2

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._