CVE-2026-32716Public exploitNetwork attack vector

Authenticated authorization bypass via prefix-matched scope paths

Published Mar 31, 2026 · Updated Mar 31, 2026

Improper authorization in SciTokens before 1.9.6 allows remote authenticated users to read or write sibling-path resources. The Enforcer's _validate_scp and _validate_scope methods use startswith on normalized requested and allowed paths, so /john incorrectly authorizes /johnathan. A valid token with a scoped path is required, and impact is limited to resources exposed by an application that relies on this Enforcer decision.

CVSS severity8.1
High
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authorization in SciTokens before 1.9.6 allows remote authenticated users to read or write sibling-path resources. The Enforcer's _validate_scp and _validate_scope methods use startswith on normalized requested and allowed paths, so /john incorrectly authorizes /johnathan. A valid token with a scoped path is required, and impact is limited to resources exposed by an application that relies on this Enforcer decision.

The record

CVE
CVE-2026-32716
Published
Mar 31, 2026
Updated
Mar 31, 2026
Vendor
SciTokens
Product
SciTokens
Classifications
CWE-285
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=< 1.9.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

SciTokens · SciTokensversion=< 1.9.6

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
8.1GitHubCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-285Improper Authorization

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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