CVE-2026-84369Network attack vectorHinoki check available

Cross-site scripting via incomplete foreignObject sanitization

Published Sep 1, 2026 · Updated Sep 2, 2026

Cross-site scripting in affected SVGO releases allows remote attackers to execute script through an optimized, crafted SVG file. The opt-in removeScripts plugin deletes SVG and XHTML script elements but leaves executable HTML inside foreignObject, including event handlers, srcdoc content, and executable action, data, formaction, href, and src URLs. Exploitation requires an application to rely on that plugin as its only sanitizer and serve attacker-controlled output in an active browser context, allowing script to read origin data, alter content, or act as the viewer.

CVSS severityUnavailable
Unscored
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Cross-site scripting in affected SVGO releases allows remote attackers to execute script through an optimized, crafted SVG file. The opt-in removeScripts plugin deletes SVG and XHTML script elements but leaves executable HTML inside foreignObject, including event handlers, srcdoc content, and executable action, data, formaction, href, and src URLs. Exploitation requires an application to rely on that plugin as its only sanitizer and serve attacker-controlled output in an active browser context, allowing script to read origin data, alter content, or act as the viewer.

The record

CVE
CVE-2026-84369
Published
Sep 1, 2026
Updated
Sep 2, 2026
Vendor
SVGO
Product
SVGO
Classifications
T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 2, 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, < 2.8.4
  2. Affected versionversion=>= 3.0.0, < 3.3.5
  3. Affected versionversion=>= 4.0.0, < 4.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

SVGO · SVGOversion=>= 1.0.0, < 2.8.4; version=>= 3.0.0, < 3.3.5; version=>= 4.0.0, < 4.1.0

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

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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