CVE-2026-77638
High
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.
SeverityHigh
CVSS8.9
Exploit probability—
ProductTor
PublishedAug 20, 2026
First seenAug 20, 2026
Weakness typeCWE-362Race condition
How to fix
Update
- torproject tor0.4.9.11 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| torproject tor | v < 0.4.9.11 | 0.4.9.11 |
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