In Tor Arti before 1.2.3, circuits sometimes incorrectly have a length of 3 (with full vanguards), aka TROVE-2024-004.
gitlab.torproject.org/tpo/core/arti
gitlab.torproject.org/tpo/core/arti/-/blob/main/CHANGELOG.md#arti-123-15-may-2024
gitlab.torproject.org/tpo/core/arti/-/commit/1a89d5c9659d799a84dd3ff00fae530f5c8ba280
gitlab.torproject.org/tpo/core/arti/-/issues/1400
gitlab.torproject.org/tpo/core/arti/-/issues/1409
gitlab.torproject.org/tpo/core/team/-/wikis/NetworkTeam/TROVE
nvd.nist.gov/vuln/detail/CVE-2024-35313
rustsec.org/advisories/RUSTSEC-2024-0339.html
rustsec.org/advisories/RUSTSEC-2024-0340.html