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-2026-77642
torproject Tor — tor before 0.4.9.9 was prone to an out-of-bounds write when parsing a consensus or detached signature with unexpected signature digest type.
AV AC PR UI S C I A CVSS EPSS %ile KEV
N L N N C N L H 9.3 .0035 26.7 —
AFFECTED
Product Versions Fixed
Tor 0.2.8.2-alpha – —
TIMELINE
Aug 20 Reserved by mitre
Aug 20 Published (CNA: mitre)
Sep 8 RESCORED — CVE-2026-77642 (torproject Tor). CVSS 7.5 → 9.3 (NVD).
Description
tor before 0.4.9.9 was prone to an out-of-bounds write when parsing a consensus or detached signature with unexpected signature digest type. Impact is minor for most Tor roles, but potentially major for directory authorities. This is TROVE-2026-019.
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 8, 2026 | RESCORED | RESCORED — CVE-2026-77642 (torproject Tor). CVSS 7.5 → 9.3 (NVD). |
Affected
Affected products and packages — 1 row
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| torproject | Tor | — | 0.2.8.2-alpha | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-77642 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.
