---
cve: "CVE-2026-67587"
severity: "HIGH"
cvss: 8.8
epss: "61%"
vendor: "Apache Software Foundation"
kev: false
exploited: false
published: "2026-08-12 16:17:15"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-14T06:50:15+02:00"
---

# CVE-2026-67587

> 8.8 HIGH · 🧪 PoC

## Beschreibung

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-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- 275ac7303fa702e232c277ac7f4929baa85464d2 (Commit)

## Referenzen

- <https://github.com/apache/airflow/pull/70704>
- <https://www.cve.org/CVERecord?id=CVE-2026-58076>
- <https://www.cve.org/CVERecord?id=CVE-2026-67260>
- <https://lists.apache.org/thread/o00ww4n69qojvsckb464dtwd2nhzy6t0>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-67587) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_