CVE-2026-32726

HIGH

SciTokens C++: Sibling-Path Authorization Bypass

Title source: cna

Description

SciTokens C++ is a minimal library for creating and using SciTokens from C or C++. Prior to version 1.4.1, scitokens-cpp is vulnerable to an authorization bypass in path-based scope validation. The enforcer used a simple string-prefix comparison when checking whether a requested resource path was covered by a token's authorized scope path. Because the check did not require a path-segment boundary, a token scoped to one path could incorrectly authorize access to sibling paths that merely started with the same prefix. This issue has been patched in version 1.4.1.

Scores

CVSS v3 8.1
EPSS 0.0003
EPSS Percentile 9.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact total

Details

CWE
CWE-863
Status published
Products (2)
scitokens/scitokens-cpp < 1.4.1
scitokens/scitokens_cpp_library < 1.4.1
Published Mar 31, 2026
Tracked Since Mar 31, 2026