CVE-2026-18986Network attack vectorHinoki check available

Stored XSS via unsanitized tab titles

Published Sep 2, 2026 · Updated Sep 2, 2026

Stored XSS in Drupal Entity Browser before 2.16.0 allows remote authenticated users to execute script in a viewer's browser. The module fails to sufficiently sanitize tab titles before rendering them on an entity browser page, preserving attacker-supplied HTML attributes. Exploitation requires permission to insert such HTML on that page and can read or alter data available to the viewing user's session.

CVSS severity4.8
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Stored XSS in Drupal Entity Browser before 2.16.0 allows remote authenticated users to execute script in a viewer's browser. The module fails to sufficiently sanitize tab titles before rendering them on an entity browser page, preserving attacker-supplied HTML attributes. Exploitation requires permission to insert such HTML on that page and can read or alter data available to the viewing user's session.

The record

CVE
CVE-2026-18986
Published
Sep 2, 2026
Updated
Sep 2, 2026
Vendor
OAuth.js
Product
Entity Browser
Classifications
CWE-79, CAPEC-592, T1203
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Sep 2, 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=0.0.0 <2.16.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

OAuth.js · Entity Browserversion=0.0.0 <2.16.0

Published CVSS scores

4.8CISA ADPCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation (Cross-site Scripting)
CAPEC-592Stored XSS
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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