CVE-2026-32727 HIGH

CVE-2026-32727: SciTokens: Authorization Bypass via Path Traversal in Scope Validation

Vendor Scitokens
Product scitokens
Weakness CWE-22 · Path traversal
Published March 31, 2026
Last update April 2, 2026

CVSS base score

8.1/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

What the vulnerability does

01Description

SciTokens is a reference library for generating and using SciTokens. Prior to version 1.9.7, the Enforcer is vulnerable to a path traversal attack where an attacker can use dot-dot (..) in the scope claim of a token to escape the intended directory restriction. This occurs because the library normalizes both the authorized path (from the token) and the requested path (from the application) before comparing them using startswith. This issue has been patched in version 1.9.7.

Key dates

02Disclosure timeline

March 31, 2026 CVE published
April 2, 2026 Record updated