CVE-2026-67587

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH 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(high)
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
47%
KEV
Not listed

Published

August 12, 2026

Last Modified

August 17, 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.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 29× in last 7d / 42× 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.

  1. 2026-08-21 01:03 UTCEG score recompute
  2. 2026-08-21 01:03 UTCGHSA enrichment
  3. 2026-08-20 22:56 UTCEPSS rescore
  4. 2026-08-20 14:05 UTCGHSA enrichment
  5. 2026-08-20 02:42 UTCEG score recompute
  6. 2026-08-20 02:42 UTCGHSA enrichment
  7. 2026-08-19 17:04 UTCEPSS rescore
  8. 2026-08-19 15:34 UTCGHSA enrichment
  9. 2026-08-19 04:26 UTCGHSA enrichment
  10. 2026-08-18 17:25 UTCEG score recompute
  11. 2026-08-18 17:25 UTCGHSA enrichment
  12. 2026-08-18 13:48 UTCEPSS rescore
  13. 2026-08-18 06:27 UTCGHSA enrichment
  14. 2026-08-17 19:28 UTCGHSA enrichment
  15. 2026-08-17 16:29 UTCEG score recompute
  16. 2026-08-17 16:29 UTCGHSA enrichment
  17. 2026-08-17 13:47 UTCEPSS rescore
  18. 2026-08-17 05:24 UTCGHSA enrichment
  19. 2026-08-16 18:22 UTCEG score recompute
  20. 2026-08-16 18:22 UTCGHSA enrichment
  21. 2026-08-16 14:56 UTCEPSS rescore
  22. 2026-08-16 07:24 UTCEG score recompute
  23. 2026-08-16 07:24 UTCGHSA enrichment
  24. 2026-08-15 20:27 UTCGHSA enrichment
  25. 2026-08-15 09:29 UTCEG score recompute
Show 17 more
  1. 2026-08-15 09:29 UTCGHSA enrichment
  2. 2026-08-15 01:30 UTCEPSS rescore
  3. 2026-08-14 22:31 UTCGHSA enrichment
  4. 2026-08-14 11:33 UTCGHSA enrichment
  5. 2026-08-14 00:35 UTCEG score recompute
  6. 2026-08-14 00:35 UTCGHSA enrichment
  7. 2026-08-13 22:00 UTCEPSS rescore
  8. 2026-08-13 13:36 UTCGHSA enrichment
  9. 2026-08-13 12:27 UTCEG score recompute▲ 8.80
  10. 2026-08-13 12:27 UTCGHSA enrichment
  11. 2026-08-13 12:26 UTCMITRE cvelistV5CVSS v3 → 8.8 · severity → HIGH
  12. 2026-08-12 21:01 UTCGHSA enrichment
  13. 2026-08-12 21:00 UTCNVD update
  14. 2026-08-12 16:40 UTCMITRE cvelistV5
  15. 2026-08-12 16:33 UTCNVD update
  16. 2026-08-12 15:36 UTCEG score recompute
  17. 2026-08-12 15:35 UTCMITRE cvelistV5first tracked

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 August 17, 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 53.3% 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.

Dependency Blast Radius

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