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.
AV AC PR UI S C I A CVSS EPSS %ile KEV N L N N U N L H 8.2 .0035 26.7 —
AFFECTED Product Versions Fixed Tor 0.4.8.1-alpha – —
TIMELINE Aug 20 Reserved by mitre Aug 20 Published (CNA: mitre) Sep 8 RESCORED — CVE-2026-77641 (torproject Tor). CVSS 6.5 → 8.2 (NVD).
tor before 0.4.9.9 was prone to a NULL write after free when sending a CONFLUX_SWITCH cell fails. The return value of relay_send_command_from_edge() was ignored, so a send failure (which calls circuit_mark_for_close() and removes the leg via cfx_del_leg()) would go undetected, causing the caller to write to the now-freed current leg and resulting in a crash. This is TROVE-2026-017.
| Date | Event | Detail |
|---|---|---|
| August 20, 2026 | Reserved | Reserved by mitre |
| August 20, 2026 | Published | Published (CNA: mitre) |
| September 8, 2026 | RESCORED | RESCORED — CVE-2026-77641 (torproject Tor). CVSS 6.5 → 8.2 (NVD). |
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|---|---|---|---|
| torproject | Tor | — | 0.4.8.1-alpha | — |
Authoritative record: CVE-2026-77641 at cve.org
Vendors: torproject
Weaknesses: CWE-252
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-77641 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.
