CVE-2026-32727Public exploitNetwork attack vector

Unauthorized resource access via normalized scope traversal

Published Mar 31, 2026 · Updated Mar 31, 2026

Path traversal in the SciTokens Library Enforcer before 1.9.7 allows remote authenticated users to access unauthorized resource paths. The _check_scope method passes scope or scp paths through urltools.normalize_path, which resolves dot-dot segments before _scope_path_matches performs a prefix comparison. A user who can influence a token scope can broaden an allowed subtree to a parent or root path, exposing sibling directories or the entire guarded resource space.

CVSS severity8.1
High
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in the SciTokens Library Enforcer before 1.9.7 allows remote authenticated users to access unauthorized resource paths. The _check_scope method passes scope or scp paths through urltools.normalize_path, which resolves dot-dot segments before _scope_path_matches performs a prefix comparison. A user who can influence a token scope can broaden an allowed subtree to a parent or root path, exposing sibling directories or the entire guarded resource space.

The record

CVE
CVE-2026-32727
Published
Mar 31, 2026
Updated
Mar 31, 2026
Vendor
SciTokens
Product
SciTokens Library
Classifications
CWE-22
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 31, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 31, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.9.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

SciTokens · SciTokens Libraryversion=< 1.9.7

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
8.1GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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