Description
Tor before 0.4.9.11 is prone to a race condition where in just the right circumstances a rendezvous point could man-in-the-middle (impersonate) the onion service that the client was trying to reach.
Published: 2026-08-20
Score: 8.9 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Thu, 27 Aug 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Fri, 21 Aug 2026 01:45:00 +0000

Type Values Removed Values Added
Title Race Condition Enables Rendezvous Point to Impersonate Onion Service in Tor

Thu, 20 Aug 2026 21:15:00 +0000

Type Values Removed Values Added
Description Tor before 0.4.9.11 is prone to a race condition where in just the right circumstances a rendezvous point could man-in-the-middle (impersonate) the onion service that the client was trying to reach.
First Time appeared Torproject
Torproject tor
Weaknesses CWE-362
CPEs cpe:2.3:a:torproject:tor:*:*:*:*:*:*:*:*
Vendors & Products Torproject
Torproject tor
References
Metrics cvssV3_1

{'score': 8.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:L'}

Subscriptions

Torproject Tor
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-08-27T16:06:47.809Z

Reserved: 2026-08-20T20:52:29.384Z

Link: CVE-2026-77638

cve-icon Vulnrichment

Updated: 2026-08-27T15:46:24.400Z

cve-icon NVD

Status : Received

Published: 2026-08-20T21:17:11.097

Modified: 2026-08-27T17:20:25.230

Link: CVE-2026-77638

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-21T01:30:05Z

Weaknesses