CVE-2026-42358 PUBLISHED

Apache Airflow: Variable masker depth-limit bypass returns cleartext nested secrets

Assigner: apache
Reserved: 26.04.2026 Published: 01.06.2026 Updated: 01.06.2026

A bug in Apache Airflow's Variable response masker caused nested-key redaction (triggered by secret-suffixed key names like password, token, secret, api_key) to be bypassed when the JSON value's nesting depth exceeded the shared secrets masker's recursion limit: the masker returned the original nested item before checking the sensitive key name. An authenticated UI/API user with Variable read permission could harvest plaintext secret values stored under sensitive keys nested deep enough to exceed the masker's depth cap. Affects deployments that store sensitive values inside deeply-nested JSON Variables. This is a residual gap in the fix for CVE-2026-32690 (which covered shallower nesting via max_depth=1); the depth-limit boundary itself was not raised, so the same key-name bypass pattern reappears beyond the recursion cap. Users who already upgraded for CVE-2026-32690 should additionally upgrade to apache-airflow 3.2.2 or later to cover the deep-nesting path.

Product Status

Vendor Apache Software Foundation
Product Apache Airflow
Versions Default: unaffected
  • affected from 0 to 3.2.2 (excl.)

Credits

  • Vincent55 (confirmed in original report sign-off) finder
  • Aymane MAZGUITI – unclej4ck finder
  • Ilyase Dehy – Albert finder
  • Jarek Potiuk remediation developer

References

Problem Types

  • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor CWE