CVE-2026-90774
8.7
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| orhun | rustypaste | 0 < 0.18.1 | affected |
Weaknesses
- CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
References
- https://github.com/orhun/rustypaste/issues/622
- https://github.com/orhun/rustypaste
- https://github.com/orhun/rustypaste/blob/v0.18.0/src/paste.rs
- https://github.com/orhun/rustypaste/commit/ac05d552596af4a8429d80f30d11f67117ce02c8
- https://www.vulncheck.com/advisories/rustypaste-before-0.18.1-path-traversal-via-filename-header
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