CVE-2026-44603: Torproject Tor

Critical severity, CVSS 9.1. EPSS: 0.6% chance of exploitation in the next 30 days.

Tor before 0.4.9.7 has an out-of-bounds read by one byte via a malformed BEGIN cell, aka TROVE-2026-007.

Affected products

• Torproject Tor: before 0.4.9.7 (fixed in 0.4.9.7)

Published 2026-05-07. Last modified 2026-06-17.