CVE-2026-96873Network attack vectorHinoki check available

Reflected XSS via unescaped debug explanation output

Published Sep 24, 2026 · Updated Sep 24, 2026

Reflected XSS in Wikimedia Foundation CirrusSearch 1.46.0 and earlier allows remote attackers to execute script via debug explain output. The search debug path renders attacker-controlled explanation content from a cirrusExplain request without neutralizing it for HTML output. A victim must follow a crafted search URL; successful exploitation runs script in the victim's MediaWiki origin and can expose or alter data available to that browser session.

CVSS severityUnavailable
Unscored
EPSS probability0.27%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Reflected XSS in Wikimedia Foundation CirrusSearch 1.46.0 and earlier allows remote attackers to execute script via debug explain output. The search debug path renders attacker-controlled explanation content from a cirrusExplain request without neutralizing it for HTML output. A victim must follow a crafted search URL; successful exploitation runs script in the victim's MediaWiki origin and can expose or alter data available to that browser session.

The record

CVE
CVE-2026-96873
Published
Sep 24, 2026
Updated
Sep 24, 2026
Vendor
Wikimedia Foundation
Product
CirrusSearch
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 24, 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=0 <=1.46.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Wikimedia Foundation · CirrusSearchversion=0 <=1.46.0

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

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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