CVE-2026-90774
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.
- Published Sep 13, 2026
- CVSS 8.7 high
- 0.6% chance of exploitation in the next 30 days (EPSS)
- A fix is available