CVE-2026-59286Network attack vectorHinoki check available

Browser code execution via CDN scripts without SRI

Published Aug 27, 2026 · Updated Aug 27, 2026

Unsafe external resource loading in Spring for GraphQL allows attackers to run JavaScript in browsers that load its bundled GraphiQL page. The stock GraphiQL index page imports JavaScript from the esm.sh CDN without Subresource Integrity, so substituted content executes as trusted page code. Exploitation requires an enabled, exposed endpoint and compromise of the CDN or its network path; resulting code can read non-HttpOnly cookies and issue authenticated same-origin requests.

CVSS severityUnavailable
Unscored
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Unsafe external resource loading in Spring for GraphQL allows attackers to run JavaScript in browsers that load its bundled GraphiQL page. The stock GraphiQL index page imports JavaScript from the esm.sh CDN without Subresource Integrity, so substituted content executes as trusted page code. Exploitation requires an enabled, exposed endpoint and compromise of the CDN or its network path; resulting code can read non-HttpOnly cookies and issue authenticated same-origin requests.

The record

CVE
CVE-2026-59286
Published
Aug 27, 2026
Updated
Aug 27, 2026
Vendor
Spring
Product
Spring for GraphQL
Classifications
CWE-494, T1195.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 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=1.0.0 <=1.0.7
  2. Affected versionversion=1.1.0 <=1.3.9
  3. Affected versionversion=1.4.0 <=1.4.6
  4. Affected versionversion=2.0.0 <=2.0.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Spring · Spring for GraphQLversion=1.0.0 <=1.0.7; version=1.1.0 <=1.3.9; version=1.4.0 <=1.4.6; version=2.0.0 <=2.0.4

Published CVSS scores

No CVSS assessment is available in this record.

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-494Download of Code Without Integrity Check
T1195.002Compromise Software Supply Chain

Public exploit references

No public exploit references are available in this record.

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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