CVE-2026-68968 json
Apache Airflow: Authorization bypass in the Backfill API through conflicting interpretations of the backfill id
published 2026-08-12 2 mo ago modified 2026-11-03 6 d ago also BIT-airflow-2026-68968 , EUVD-2026-57271 , GHSA-j4jc-cq9h-xrhr , PYSEC-2026-3710
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 36%
- public exploits
- 0
- none known
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.
Patch / fix
- pypi apache-airflow 3.3.1
- bitnami airflow 3.3.1
- Apache Software Foundation Apache Airflow 3.0.0, 3.3.1
- github.com/apache/airflow@6fcae4e commit
- github.com/apache/airflow@bbb97f5 commit
- github.com/apache/airflow#70889 pull request
- github.com/apache/airflow/releases/tag/3.3.1 release
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 mo ago
Exploit prediction
0.42% chance of exploitation in the next 30 days, higher than 36% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| GitHub | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| OSV | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | apache-airflow | <3.3.1 |
3.3.1 |
| bitnami | airflow | <3.3.1 |
3.3.1 |
Affected products
- Apache Software Foundation Apache Airflow
Classification
- Weakness
-
- CWE-436 Interpretation Conflict
References
-
github.com
/apache/airflow/pull/70889
patch, web, issue-tracking
-
github.com
/apache/airflow/commit/6fcae4e2b0aabd22b006659bc47139a124813865
web
-
github.com
/apache/airflow/commit/bbb97f55e647dd09f0725c111b7a7081b9df7850
web
-
lists.apache.org
/thread/f9zmw6xs5b4syhwzbl6fsxm4kf2632ol
vendor-advisory, web, mailing-list, discussion, article
-
openwall.com
/lists/oss-security/2026/08/12/12
web, mailing-list, discussion, article
-
nvd.nist.gov
/vuln/detail/CVE-2026-68968
advisory, web
-
github.com
/apache/airflow
package
-
github.com
/apache/airflow/releases/tag/3.3.1
web
-
github.com
/pypa/advisory-database/tree/main/vulns/apache-airflow/PYSEC-2026-3710.yaml
web
-
github.com
/advisories/GHSA-j4jc-cq9h-xrhr
advisory
Sources
- CVE List CVE-2026-68968
- GitHub Advisory GHSA-j4jc-cq9h-xrhr
- NVD CVE-2026-68968
- OSV BIT-airflow-2026-68968
- OSV PYSEC-2026-3710
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