SciTokens: Authorization Bypass via Incorrect Scope Path Prefix Checking

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Summary

CVECVE-2026-32716
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-03-31 03:15:57 UTC
Updated2026-04-01 14:24:02 UTC
DescriptionSciTokens is a reference library for generating and using SciTokens. Prior to version 1.9.6, the Enforcer incorrectly validates scope paths by using a simple prefix match (startswith). This allows a token with access to a specific path (e.g., /john) to also access sibling paths that start with the same prefix (e.g., /johnathan, /johnny), which is an Authorization Bypass. This issue has been patched in version 1.9.6.

Risk And Classification

Primary CVSS: v3.1 8.1 HIGH from [email protected]

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

EPSS: 0.000270000 probability, percentile 0.072700000 (date 2026-04-01)

Problem Types: CWE-285 | CWE-285 CWE-285: Improper Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary8.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
3.1CNADECLARED8.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Scitokens Scitokens affected < 1.9.6 Not specified

References

ReferenceSourceLinkTags
github.com/scitokens/scitokens/releases/tag/v1.9.6 [email protected] github.com
github.com/scitokens/scitokens/security/advisories/GHSA-w8fp-g9rh-34jh [email protected] github.com
github.com/scitokens/scitokens/commit/7a237c0f642efb9e8c36ac564b745895cc... [email protected] github.com
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