CVE-2026-32726

# Conceptual PoC demonstrating the vulnerable logic import sys def check_scope_vulnerable(token_scope, request_path): """ Vulnerable implementation: Simple prefix check. This logic is present in versions < 1.4.1 """ return request_path.startswith(token_scope) def check_scope_secure(token_scope, request_path): """ Secure implementation: Checks for path segment boundary. """ if request_path == token_scope: return True # Ensure the scope is followed by a separator to match full segments only if request_path.startswith(token_scope + "/"): return True return False # Simulation Scenario # Attacker has a token scoped to '/project' token_scope = '/project' # Attacker attempts to access a sibling path '/project_secret' # which starts with '/project' but is a different resource. attack_path = '/project_secret' print(f"[*] Token Scope: {token_scope}") print(f"[*] Requested Path: {attack_path}") if check_scope_vulnerable(token_scope, attack_path): print(f"[+] Vulnerable Logic: Access GRANTED to {attack_path}") else: print(f"[-] Vulnerable Logic: Access DENIED") if check_scope_secure(token_scope, attack_path): print(f"[+] Secure Logic: Access GRANTED to {attack_path}") else: print(f"[-] Secure Logic: Access DENIED")

{"cve": {"id": "CVE-2026-32726", "sourceIdentifier": "[email protected]", "published": "2026-03-31T18:16:50.997", "lastModified": "2026-04-13T17:03:28.610", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N", "baseScore": 8.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 5.2}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-863"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:scitokens:scitokens_cpp_library:*:*:*:*:*:*:*:*", "versionEndExcluding": "1.4.1", "matchCriteriaId": "CC9F84FE-5692-462D-BA2B-D9703D8AFAD1"}]}]}], "references": [{"url": "https://github.com/scitokens/scitokens-cpp/commit/decfe2f00cb9cabbf1e17a3bb2cd4ea1bbbd8a73", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/scitokens/scitokens-cpp/security/advisories/GHSA-q5fm-fgvx-32jq", "source": "[email protected]", "tags": ["Exploit", "Vendor Advisory"]}, {"url": "https://github.com/scitokens/scitokens-cpp/security/advisories/GHSA-q5fm-fgvx-32jq", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Vendor Advisory"]}]}}