CVE-2026-77638
published 2026-08-20CVE-2026-77638: 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…
PriorityP346critical9CVSS 3.1
AVNACHPRNUINSCCHIHAH
EPSS
0.30%
21.4th percentile
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
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| torproject | tor | < 0.4.9.11 | 0.4.9.11 |
| torproject | tor | >= 0.3.5.3-alpha < 0.4.9.11 | 0.4.9.11 |
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No public exploits indexed.
Bugzilla
CVE-2026-77638 tor: Tor: Onion Service Impersonation via Race Condition [fedora-all]
bugzilla·2026-08-22·CVSS 8.9
CVE-2026-77638 [HIGH] CVE-2026-77638 tor: Tor: Onion Service Impersonation via Race Condition [fedora-all]
CVE-2026-77638 tor: Tor: Onion Service Impersonation via Race Condition [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
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.
Bugzilla
CVE-2026-77638 tor: Tor: Onion Service Impersonation via Race Condition [epel-all]
bugzilla·2026-08-22·CVSS 8.9
CVE-2026-77638 [HIGH] CVE-2026-77638 tor: Tor: Onion Service Impersonation via Race Condition [epel-all]
CVE-2026-77638 tor: Tor: Onion Service Impersonation via Race Condition [epel-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
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.
Bugzilla
CVE-2026-77638 tor: Tor: Onion Service Impersonation via Race Condition
bugzilla·2026-08-20·CVSS 8.9
CVE-2026-77638 [HIGH] CVE-2026-77638 tor: Tor: Onion Service Impersonation via Race Condition
CVE-2026-77638 tor: Tor: Onion Service Impersonation via Race Condition
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.
2026-08-20
Published