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CVE-2026-32726— SciTokens C++: Sibling-Path Authorization Bypass

Quick assessment

Affected
scitokens scitokens-cpp
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

scitokens是SciTokens开源的一个基于JWT的科学计算令牌库。 scitokens 1.4.1之前版本存在安全漏洞，该漏洞源于执行器在检查请求的资源路径是否被令牌授权范围路径覆盖时使用简单字符串前缀比较，可能导致授权绕过。

CVSS 8.1 · High EPSS 0.38% · P30

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts
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I. Basic Information for CVE-2026-32726

Vulnerability Information
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Vulnerability Title
SciTokens C++: Sibling-Path Authorization Bypass
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5
Vulnerability Title
scitokens 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
scitokens是SciTokens开源的一个基于JWT的科学计算令牌库。 scitokens 1.4.1之前版本存在安全漏洞，该漏洞源于执行器在检查请求的资源路径是否被令牌授权范围路径覆盖时使用简单字符串前缀比较，可能导致授权绕过。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
scitokens scitokens-cpp < 1.4.1 -

II. Public POCs for CVE-2026-32726

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 10925 chars
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III. Intelligence Information for CVE-2026-32726

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Patches & Fixes for CVE-2026-32726 (1)

Vendor Advisories for CVE-2026-32726 (1)

Same Patch Batch · scitokens · 2026-03-31 · 5 CVEs total

CVE-2026-32714 9.8 CRITICAL SciTokens vulnerable to SQL Injection in KeyCache
CVE-2026-32725 8.3 HIGH SciTokens C++: Relative Path Traversal Vulnerability
CVE-2026-32727 8.1 HIGH SciTokens: Authorization Bypass via Path Traversal in Scope Validation
CVE-2026-32716 8.1 HIGH SciTokens: Authorization Bypass via Incorrect Scope Path Prefix Checking

IV. Related Vulnerabilities

Same product: scitokens-cpp
Same vendor: scitokens
Same weakness: CWE-863

V. Comments for CVE-2026-32726

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