Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2026-77638
torproject Tor — 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 (impers…
AV AC PR UI S C I A CVSS EPSS %ile KEV
N H N N C H H H 9.0 .0030 20.5 —
AFFECTED
Product Versions Fixed
Tor 0.3.5.3-alpha – —
TIMELINE
Aug 20 Reserved by mitre
Aug 20 Published (CNA: mitre)
Sep 16 RESCORED — CVE-2026-77638 (torproject Tor). CVSS 8.9 → 9 (NVD).
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.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| August 20, 2026 | Reserved | Reserved by mitre |
| August 20, 2026 | Published | Published (CNA: mitre) |
| September 16, 2026 | RESCORED | RESCORED — CVE-2026-77638 (torproject Tor). CVSS 8.9 → 9 (NVD). |
Affected
Affected products and packages — 1 row
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| torproject | Tor | — | 0.3.5.3-alpha | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-77638 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
