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: 1.2%CVSS: 8.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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
8.8HIGHmedium confidence
EG Risk
40
EG Risk 40/100CISA SSVC

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%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
1.2%
EPSS %ILE
66th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 12, 2026

Last Modified

September 16, 2026

Advisory Details (4)

Auto-updated Aug 13, 2026
Patch available. 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 rangeFix by version rangeDependents
apache-airflow3.3.0, 3.3.1rc1, 3.3.1rc2
  • 3.3.0 up to 3.3.1: fixed in 3.3.1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 17× in last 7d / 93× 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 191 total refreshes for this CVE.

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

Related CVEs(same product + 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 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 1.2% probability of exploitation in the next 30 days (66th percentile of EPSS-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?
A fix for CVE-2026-67587 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-67587 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-67587

Explore →

Is Your Infrastructure Affected by CVE-2026-67587?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs