CVE-2026-32727

SciTokens: Authorization Bypass via Path Traversal in Scope Validation

MEDIUM
6.5
CVSS Score
Published: March 31, 2026 at 01:31 AM UTC
Updated: June 17, 2026 at 10:36 AM UTC
2 products affected across 1 vendorScitokens LibrarySciTokens

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.5%
SSVC
PoC

Description

SciTokens is a reference library for generating and using SciTokens. Prior to version 1.9.7, the Enforcer is vulnerable to a path traversal attack where an attacker can use dot-dot (..) in the scope claim of a token to escape the intended directory restriction. This occurs because the library normalizes both the authorized path (from the token) and the requested path (from the application) before comparing them using startswith. This issue has been patched in version 1.9.7.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 1.9.7
Affected range stops below 1.9.7, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (4)

x_refsource_CONFIRMExploitVendor Advisory
Source: cverecord
https://github.com/scitokens/scitokens/security/advisories/GHSA-3x2w-63fp-3qvw
x_refsource_MISCIssue Tracking
Source: cverecord
https://github.com/scitokens/scitokens/pull/230
x_refsource_MISCRelease Notes
Source: cverecord
https://github.com/scitokens/scitokens/releases/tag/v1.9.7

SSVC — Action Prioritization

SSVCPoCNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-22

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