CVE-2026-67587

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-12. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.8Exploit: None knownExposed: 0

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

Apache Airflow's Task SDK rebuilt a Callback object from serialized data by re-running its constructor, which imports the module named by the stored callback path. Because SyncCallback is itself an Airflow class it passes the default allowed_deserialization_classes allow-list, so tightening that setting does not help. A Dag author — who controls a task instance's next_kwargs through the task execution API — can therefore cause an arbitrary module to be imported inside the scheduler process, when the scheduler's awaiting_input timeout sweep deserializes that value. No non-default configuration is required; the sweep runs unconditionally. Versions before 3.3.0 are not affected: the class existed, but the scheduler sweep that reaches it did not. This is a separate code path from CVE-2026-58076 and CVE-2026-67260, which cover different gadgets reaching deserialization — applying either of those fixes does not address this one. Users are advised to upgrade to apache-airflow 3.3.1 or later.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity88% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
48%
KEV
Not listed

Published

August 12, 2026

Last Modified

September 16, 2026

Advisory Details (4)

Auto-updated Aug 13, 2026
Upstream fix merged — awaiting tagged release. Sources: github_pr.
generic
https://lists.apache.org/thread/o00ww4n69qojvsckb464dtwd2nhzy6t0
generic
https://www.cve.org/CVERecord?id=CVE-2026-67260
generic
https://www.cve.org/CVERecord?id=CVE-2026-58076
github_pr

Do not import the stored path when rebuilding a Callback from serialized data

Fix merged in apache/airflow PR #70704 on 2026-08-04 — awaiting tagged release

https://github.com/apache/airflow/pull/70704

Vendor Advisories for CVE-2026-67587(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-airflow3.3.0, 3.3.1rc1, 3.3.1rc23.3.1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 26× in last 7d / 111× 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 149 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-67587?
CVE-2026-67587 is a high vulnerability published on August 12, 2026. Apache Airflow's Task SDK rebuilt a Callback object from serialized data by re-running its constructor, which imports the module named by the stored callback path. Because SyncCallback is itself an Airflow class it passes the default alloweddeserializationclasses allow-list, so tightening that…
When was CVE-2026-67587 disclosed?
CVE-2026-67587 was first published in the National Vulnerability Database on August 12, 2026, with the most recent update on September 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-67587 actively exploited?
CVE-2026-67587 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 52.1% of all scored CVEs.
What is the CVSS score of CVE-2026-67587?
CVE-2026-67587 has a CVSS v3.1 base score of 8.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-67587?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-67587, 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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