Auth bypass in Scitokens Scitokens-Cpp
CVE-2026-32726
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.
Vulnerability class: Broken Access Control
EPSS: 0.003 (19.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.
Affected products
- Scitokens Scitokens-cpp — versions < 1.4.1
- Scitokens Scitokens_cpp_library
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-32726?
- CVE-2026-32726 is a high-severity vulnerability in Scitokens Scitokens-Cpp, classified under Incorrect Authorization. CVSS score: 8.1/10. Published 2026-03-31.
- How severe is CVE-2026-32726?
- High severity. CVSS v3 base score is 8.1 out of 10.