Apache Zeppelin up to 0.12.0 LdapRealm injection

Summaryinfo

A vulnerability identified as critical has been detected in Apache Zeppelin up to 0.12.0. The affected element is an unknown function of the component LdapRealm. This manipulation causes injection. This vulnerability is handled as CVE-2026-44617. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as critical was found in Apache Zeppelin up to 0.12.0. Affected by this vulnerability is some unknown functionality of the component LdapRealm. The manipulation with an unknown input leads to a injection vulnerability. The CWE definition for the vulnerability is CWE-74. The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

LDAP filter injection vulnerability in Apache Zeppelin. LdapRealm used RFC 4514 distinguished-name escaping when constructing LDAP search filters instead of RFC 4515 filter escaping, leaving special filter characters insufficiently escaped.                   This is an incomplete fix of CVE-2024-31867. This issue affects Apache Zeppelin versions 0.11.1, 0.11.2, and 0.12.0. Users are recommended to upgrade to version 0.12.1, which fixes this issue.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-44617 since 05/07/2026. The exploitation appears to be easy. The attack can be launched remotely. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/30/2026). MITRE ATT&CK project uses the attack technique T1055 for this issue.

Upgrading to version 0.12.1 eliminates this vulnerability.

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Productinfo

Vendor

• Apache

Name

• Zeppelin

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11
• 0.12.0

License

• open-source

Website

• Vendor: https://www.apache.org/
• Product: https://github.com/apache/zeppelin/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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