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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
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://github.com/orhun/rustypaste/issues/622
https://www.vulncheck.com/advisories/rustypaste-before-0.18.1-path-traversal-via-filename-header
https://github.com/orhun/rustypaste/issues/622

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-13 11:17

Updated : 2026-09-14 16:17

NVD link : CVE-2026-90774

Mitre link : CVE-2026-90774

CVE.ORG link : CVE-2026-90774

JSON object : View

Products Affected

No product.

CWE

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

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