# Apache Airflow FAB Auth Manager contains an LDAP filter injection vulnerability

Advisory record · `GHSA-g283-w6fp-c4fc`

- **Identifiers:** `GHSA-g283-w6fp-c4fc` · `CVE-2026-46745` · `PYSEC-2026-2366`
- **State:** Confirmed
- **Severity:** CVSS 5.3 Medium
- **Critical:** No
- **Weakness (CWE):** [CWE-90](https://cwe.mitre.org/data/definitions/90.html)
- **Tags:** [Other injection](https://agentprime.io/advisories/tag/injection.md)
- **Published:** 26 May 2026
- **Updated:** 13 Jul 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 26 May 2026, 13:30 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `apache-airflow-providers-fab` (PyPI): affected `<3.6.4`; fixed in `3.6.4`

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> Apache Airflow FAB Auth Manager (apache-airflow-providers-fab) versions before 3.6.4 contain an LDAP filter injection vulnerability. An unauthenticated attacker may be able to exfiltrate directory data or bypass authentication. Upgrade apache-airflow-providers-fab to version 3.6.4 or later; if that is not possible, disable LDAP authentication until the update can be applied.

Written 6 Nov 2026.

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 5.3 Medium, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N`, from GitHub Advisory Database

- **CISA KEV:** Not listed.
- **EPSS:** 0.0057, the 48th percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 15:01 UTC: First seen by agentprime
- 31 Oct 2026, 15:01 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-g283-w6fp-c4fc)

## Sources

- [GitHub Advisory Database: GHSA-g283-w6fp-c4fc](https://github.com/advisories/GHSA-g283-w6fp-c4fc)
- [OSV: GHSA-g283-w6fp-c4fc](https://osv.dev/vulnerability/GHSA-g283-w6fp-c4fc)
- <https://nvd.nist.gov/vuln/detail/CVE-2026-46745>
- <https://github.com/apache/airflow/pull/66417>
- <https://github.com/apache/airflow/commit/3f7756bea71a7c7988511ec0557314ffb15fbe5e>
- <https://github.com/apache/airflow>
- <https://lists.apache.org/thread/dvfy0bs181xwsrjrd3y5c55ztbzm8yhh>
- <http://www.openwall.com/lists/oss-security/2026/05/24/10>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-g283-w6fp-c4fc>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-g283-w6fp-c4fc/>. Everything for agents: <https://agentprime.io/llms.txt>.