CVE-2026-68968 (GCVE-0-2026-68968)
Vulnerability from cvelistv5 – Published: 2026-08-12 15:27 – Updated: 2026-09-16 14:57
VLAI
EPSS
VEX
Title
Apache Airflow: Authorization bypass in the Backfill API through conflicting interpretations of the backfill id
Summary
Apache Airflow's Backfill API authorized a request against a Dag id supplied by the caller whenever the `backfill_id` path segment failed to parse. The authorization dependency parsed it with `int()` while the route handler parsed it as pydantic's `NonNegativeInt`, which accepts values `int()` rejects (`1.0` coerces to `1`); FastAPI resolves dependencies before endpoint validation, so the two acted on different Dags. An authenticated user holding edit permission on any single Dag could therefore read, pause and cancel backfills belonging to any other Dag, including moving another Dag's queued runs to `failed`. No non-default configuration is required and backfill ids are sequential, so finding a target is trivial. Users are advised to upgrade to apache-airflow 3.3.1 or later, which parses the backfill id with the same type the routes declare.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 12:12 UTC
CWE
- CWE-436 - Interpretation Conflict
Assigner
References
3 references
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Apache Software Foundation | Apache Airflow |
Affected:
0 , < 3.3.1
(semver)
|
guessed |
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