---
title: "CVE-2026-92121: Apache WSS4J - Broken Access Control"
description: "Apache WSS4J streaming (StAX) code contains a broken access control vulnerability caused by a permanently set internal flag in WS-Security STR-Transform, letting attackers bypass SOAP Body signature verification, exploit requires crafted SOAP messages."
url: https://panop.io/threat-heartbeat/CVE-2026-92121/
---

# CVE-2026-92121 Apache WSS4J - Broken Access Control

Apache WSS4J streaming (StAX) code contains a broken access control vulnerability caused by a permanently set internal flag in WS-Security STR-Transform, letting attackers bypass SOAP Body signature verification, exploit requires crafted SOAP messages.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.55% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-92121)

## Details

Type

Broken Access Control

Impact

Broken Access Control

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Published

30 September 2026

Updated

15 October 2026

Weakness

[CWE-693](https://cwe.mitre.org/data/definitions/693.html)

## Vendor fix

Upgrade to versions 4.0.2, 3.0.6, or 2.4.4 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-92121](https://nvd.nist.gov/vuln/detail/CVE-2026-92121)
- [https://lists.apache.org/thread.html/oop9p4hpl5o9byosb1qg3z7q1sgnn4pc](https://lists.apache.org/thread.html/oop9p4hpl5o9byosb1qg3z7q1sgnn4pc)
- [http://www.openwall.com/lists/oss-security/2026/09/30/12](http://www.openwall.com/lists/oss-security/2026/09/30/12)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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