usebruno Bruno up to 3.4.2 path traversal

Summaryinfo

A vulnerability marked as problematic has been reported in usebruno Bruno up to 3.4.2. Impacted is an unknown function. The manipulation leads to path traversal. This vulnerability is listed as CVE-2026-85665. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in usebruno Bruno up to 3.4.2. It has been rated as problematic. This issue affects an unknown code. 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 confidentiality. The summary by CVE is:

Bruno versions through 3.4.2 fail to validate file paths in request body declarations, allowing attackers to read arbitrary local files by using parent-directory traversal segments. When a collection is executed, attackers can craft a request with a body:file path containing ../ sequences that resolve outside the collection directory, causing the application to read and exfiltrate arbitrary files to attacker-controlled endpoints.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-85665 since 09/04/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/04/2026). The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• usebruno

Name

• Bruno

Version

• 3.4.0
• 3.4.1
• 3.4.2

Website

• Product: https://github.com/usebruno/bruno/

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