CVE-2026-129349

Apache Shiro: DefaultLdapRealm accepts any password when authentication caching is enabled

Published Nov 15, 2026 CVSS 4.0 · 9.1 Critical EPSS n/a KEV · Not listed

Description

When authentication caching is enabled on DefaultLdapRealm, after a user logs in successfully once, subsequent logins for that user succeed with any password.
A cached authentication skips the LDAP bind, and the AllowAllCredentialsMatcher installed by default in DefaultLdapRealm accepts any credentials, allowing an attacker who knows a valid username to authenticate as that user.
This issue affects all Apache Shiro versions through 3.0.0, only when using DefaultLdapRealm (or JndiLdapRealm) with authenticationCachingEnabled set to true, which is not the default.

Mitigation: Upgrade to version 3.0.1 or later, which fixes the issue by no longer installing AllowAllCredentialsMatcher by default.
Alternatively, disable authentication caching on the LDAP realm (this is the default), or configure a credentials matcher, such as SimpleCredentialsMatcher, that verifies credentials against the cached authentication info.

Analysis

No analysis available yet

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Apache Software Foundation

Apache Shiro

unaffected

Version	Status	Constraints
`0`	affected	< 3.0.1

No data.

No data available yet.

Remediation

No remediation available yet

Tracking

Advisories

No advisories available

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements Present

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://lists.apache.org/thread.html/1whn52ht402lhc782c3s843c9hho8b4y

History

Nov 15, 2026 9:45 AM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		When authentication caching is enabled on DefaultLdapRealm, after a user logs in successfully once, subsequent logins for that user succeed with any password. A cached authentication skips the LDAP bind, and the AllowAllCredentialsMatcher installed by default in DefaultLdapRealm accepts any credentials, allowing an attacker who knows a valid username to authenticate as that user. This issue affects all Apache Shiro versions through 3.0.0, only when using DefaultLdapRealm (or JndiLdapRealm) with authenticationCachingEnabled set to true, which is not the default. Mitigation: Upgrade to version 3.0.1 or later, which fixes the issue by no longer installing AllowAllCredentialsMatcher by default. Alternatively, disable authentication caching on the LDAP realm (this is the default), or configure a credentials matcher, such as SimpleCredentialsMatcher, that verifies credentials against the cached authentication info.
Title		Apache Shiro: DefaultLdapRealm accepts any password when authentication caching is enabled
Weaknesses		CWE-287
References		https://lists.apache.org/thread.html/1whn52ht402lhc782c3s843c9hho8b4y
Metrics		cvssV4_0 `{'score': 9.1, '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/S:N/AU:Y/R:U/V:C/RE:L/U:Red'}`