CVE-2026-90561Network attack vectorHinoki check available

Account takeover via unsanitized WYSIWYG preview

Published Sep 13, 2026 · Updated Sep 13, 2026

Stored cross-site scripting in Strapi 4.0.0 through 4.26.2 and 5.x before 5.48.1 allows remote authenticated users to hijack admin accounts. The content manager WYSIWYG preview preserves script tags in stored rich text and executes them when a privileged user expands the preview pane. Author-role access is required to plant the payload, and execution in an Editor or Super Admin session exposes that account to takeover.

CVSS severityUnavailable
Unscored
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Stored cross-site scripting in Strapi 4.0.0 through 4.26.2 and 5.x before 5.48.1 allows remote authenticated users to hijack admin accounts. The content manager WYSIWYG preview preserves script tags in stored rich text and executes them when a privileged user expands the preview pane. Author-role access is required to plant the payload, and execution in an Editor or Super Admin session exposes that account to takeover.

The record

CVE
CVE-2026-90561
Published
Sep 13, 2026
Updated
Sep 13, 2026
Vendor
Strapi
Product
Strapi
Classifications
T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 13, 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=4.0.0 <=4.26.2
  2. Affected versionversion=5.0.0 <5.48.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Strapi · Strapiversion=4.0.0 <=4.26.2; version=5.0.0 <5.48.1

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1203Exploitation for Client Execution

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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