CVE-2026-84370Network attack vectorHinoki check available

Cross-site scripting via executable-link filter bypass

Published Sep 1, 2026 · Updated Sep 1, 2026

XSS in SVGO 1.0.0 through 2.8.3, 3.0.0 through 3.3.4, and 4.0.0 through 4.0.2 allows remote attackers to run script via SVG links. The opt-in removeScripts plugin overlooks namespace-prefixed SVG anchors and checks URL schemes without first stripping ASCII tabs, line feeds, or carriage returns. Exploitation requires attacker-controlled SVG input, an active browser context, and a victim who activates the surviving link; script then runs in the SVG origin and can read data or modify content.

CVSS severity8.2
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

XSS in SVGO 1.0.0 through 2.8.3, 3.0.0 through 3.3.4, and 4.0.0 through 4.0.2 allows remote attackers to run script via SVG links. The opt-in removeScripts plugin overlooks namespace-prefixed SVG anchors and checks URL schemes without first stripping ASCII tabs, line feeds, or carriage returns. Exploitation requires attacker-controlled SVG input, an active browser context, and a victim who activates the surviving link; script then runs in the SVG origin and can read data or modify content.

The record

CVE
CVE-2026-84370
Published
Sep 1, 2026
Updated
Sep 1, 2026
Vendor
SVGO
Product
SVGO
Classifications
CWE-184, CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 1, 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

8.2GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/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-184Incomplete List of Disallowed Inputs
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001Malicious Link

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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