CVE-2026-97711Public exploitNetwork attack vectorHinoki check available

Cross-site scripting via swallowed script-closing tag

Published Sep 29, 2026 · Updated Sep 29, 2026

Cross-site scripting in Yahoo serialize-javascript 7.1.1 allows attackers to run page-origin JavaScript through crafted function source. In the function path, SCRIPT_CLOSE_REGEXP consumes two script-closing tags as one match but neutralizes only the first, leaving the second tag to end an inline script. Exploitation requires attacker influence over a serialized function and an application that embeds the output in a script element; ordinary data and JSON-only output are unaffected.

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

What happened

Cross-site scripting in Yahoo serialize-javascript 7.1.1 allows attackers to run page-origin JavaScript through crafted function source. In the function path, SCRIPT_CLOSE_REGEXP consumes two script-closing tags as one match but neutralizes only the first, leaving the second tag to end an inline script. Exploitation requires attacker influence over a serialized function and an application that embeds the output in a script element; ordinary data and JSON-only output are unaffected.

The record

CVE
CVE-2026-97711
Published
Sep 29, 2026
Updated
Sep 29, 2026
Vendor
Yahoo! Inc.
Product
serialize-javascript
Classifications
CWE-80, T1059.007
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 29, 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=>= 7.1.1, < 7.1.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

Yahoo! Inc. · serialize-javascriptversion=>= 7.1.1, < 7.1.2

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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-80Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
T1059.007Command and Scripting Interpreter: JavaScript

Public exploit references

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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