CVE-2026-53663Network attack vector

State changes via method-limited CSRF validation

Published Jun 22, 2026 · Updated Jun 22, 2026

CSRF in React Router Framework Mode 7.12.0 through 7.15.0 allows remote attackers to submit unintended state-changing requests. The handleDocumentRequest path applies its CSRF validation only to POST requests, allowing PUT, PATCH, and DELETE document requests to bypass the same check. Exploitation requires Framework Mode and user interaction; Declarative Mode and Data Mode are unaffected, while CORS preflight and SameSite cookies block modern cross-origin browser paths.

CVSS severity3.1
Low
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CSRF in React Router Framework Mode 7.12.0 through 7.15.0 allows remote attackers to submit unintended state-changing requests. The handleDocumentRequest path applies its CSRF validation only to POST requests, allowing PUT, PATCH, and DELETE document requests to bypass the same check. Exploitation requires Framework Mode and user interaction; Declarative Mode and Data Mode are unaffected, while CORS preflight and SameSite cookies block modern cross-origin browser paths.

The record

CVE
CVE-2026-53663
Published
Jun 22, 2026
Updated
Jun 22, 2026
Vendor
Shopify
Product
@remix-run/server-runtime
Classifications
CWE-352
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 22, 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=>= 2.17.3, < 2.17.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Shopify · @remix-run/server-runtimeversion=>= 2.17.3, < 2.17.5
Shopify · React Routerversion=>= 7.12.0, < 7.15.1

Published CVSS scores

3.1GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/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.

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-352Cross-Site Request Forgery (CSRF)

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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