CVE-2026-92001Hinoki check available

Service interruption via recursive XML entity expansion

Published Sep 23, 2026 · Updated Sep 23, 2026

XML entity expansion in Apache Sling XSS before 2.4.12 allows attackers to exhaust application resources through crafted XML input. XSSAPIImpl.getValidXML accepts DOCTYPE declarations containing recursive internal entities and passes them to an XML parser without an expansion bound. Exploitation requires a consuming Sling application to pass attacker-controlled XML to getValidXML; no data access or modification is reported.

CVSS severityUnavailable
Unscored
EPSS probability0.35%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

XML entity expansion in Apache Sling XSS before 2.4.12 allows attackers to exhaust application resources through crafted XML input. XSSAPIImpl.getValidXML accepts DOCTYPE declarations containing recursive internal entities and passes them to an XML parser without an expansion bound. Exploitation requires a consuming Sling application to pass attacker-controlled XML to getValidXML; no data access or modification is reported.

The record

CVE
CVE-2026-92001
Published
Sep 23, 2026
Updated
Sep 23, 2026
Vendor
Apache Software Foundation
Product
Apache Sling XSS Protection
Classifications
CWE-776, CAPEC-197, T1499.004
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 23, 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?

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  1. Affected versionversion=0 <2.4.12

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

Apache Software Foundation · Apache Sling XSS Protectionversion=0 <2.4.12

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)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-776Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')
CAPEC-197Exponential Data Expansion
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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