---
title: "CVE-2026-101296: Apache Tomcat - Authentication Bypass"
description: "Apache Tomcat 11.0.0-M1 through 11.0.26, 10.1.0-M1 through 10.1.60, and 9.0.0.M1 through 9.0.122 contain an authentication bypass caused by missing critical authentication step in JNDI realm with non-GSSAPI SASL mechanism, letting attackers authenticate without correct password, exploit requires JNDI realm configuration with non-GSSAPI SASL."
url: https://panop.io/threat-heartbeat/CVE-2026-101296/
---

# CVE-2026-101296 Apache Tomcat - Authentication Bypass

Apache Tomcat 11.0.0-M1 through 11.0.26, 10.1.0-M1 through 10.1.60, and 9.0.0.M1 through 9.0.122 contain an authentication bypass caused by missing critical authentication step in JNDI realm with non-GSSAPI SASL mechanism, letting attackers authenticate without correct password, exploit requires JNDI realm configuration with non-GSSAPI SASL.

CVSS base score 9.1 /10

Critical

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-101296)

## Details

Type

Authentication Bypass

Impact

Broken Authentication

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Published

20 October 2026

Updated

21 October 2026

Weakness

[CWE-304](https://cwe.mitre.org/data/definitions/304.html)

## Vendor fix

Upgrade to versions 11.0.27, 10.1.61, or 9.0.123.

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-2026-101296](https://nvd.nist.gov/vuln/detail/CVE-2026-101296)
- [https://lists.apache.org/thread.html/bl52b9go9ckoov8x4v3dt6rkm573cygd](https://lists.apache.org/thread.html/bl52b9go9ckoov8x4v3dt6rkm573cygd)
- [http://www.openwall.com/lists/oss-security/2026/10/20/26](http://www.openwall.com/lists/oss-security/2026/10/20/26)

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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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