CVE-2026-77584
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.
Scoring
- Severity
- HIGH
- CVSS base score
- 7
- CVSS vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L
- EPSS probability
- 0.18%
- CWE
- CWE-821
- Published
- 2026-08-20
- Last modified
- 2026-08-25
Affected products
- torproject Tor
Weakness type
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