orhun rustypaste up to 0.18.0 path traversal

Summaryinfo

A vulnerability was found in orhun rustypaste up to 0.18.0. It has been rated as problematic. The affected element is an unknown function. The manipulation leads to path traversal. This vulnerability is uniquely identified as CVE-2026-90774. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in orhun rustypaste up to 0.18.0 and classified as problematic. This issue affects an unknown function. The manipulation with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is integrity. The summary by CVE is:

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.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-90774 since 09/13/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1006 for this issue.

Upgrading to version 0.18.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-76995). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• orhun

Name

• rustypaste

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11
• 0.12
• 0.13
• 0.14
• 0.15
• 0.16
• 0.17
• 0.18.0

Website

• Product: https://github.com/orhun/rustypaste/

CPE 2.3info

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CPE 2.2info

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Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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