CVE-2026-90774: Orhun Rustypaste

High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days.

rustypaste before 0.18.1 validates the destination path before applying the optional custom filename HTTP header, allowing attackers to bypass directory-escape checks. Attackers can supply path traversal sequences in the filename header to write files outside the configured upload directory to arbitrary locations.

Affected products

• Orhun Rustypaste: before 0.18.1 (fixed in 0.18.1)

Published 2026-09-13. Last modified 2026-09-23.