What’s Vulnerable › Vulnerabilities
CVE-2026-77638
- Severity: critical (CVSS 9.0 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-08-20 · updated 2026-10-18
- Weakness: CWE-362
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.
Affected products
- torproject Tor: before 0.4.9.11 — fixed in 0.4.9.11
How to fix
Upgrade to a fixed version: torproject Tor 0.4.9.11. Check the vendor advisory for mitigations.
References
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