CVE record · CVE-2026-111421

Apache Airflow: Execution API: set_xcom skips the reserved-key check, so task-written XComs instantiate airflow.* classes on the API server

CVSS 8.8 HighEPSS 0.0060 · 49th percentile

Published by the CVE Program (CNA: apache) at 9 Nov 2026, 09:15 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Apache Software Foundation	Apache Airflow Package name: apache-airflow-core https://pypi.python.org pkg:pypi/apache-airflow-core	affected 3.0.0 to before 3.4.0 semver Other versions: unaffected

Identifiers: CVE-2026-111421
CNA: apache
Weakness (CWE): CWE-502
Tags: Apache Software Foundation Apache Airflow
Insecure deserialization
Published: 9 Nov 2026
Updated: 9 Nov 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
8.8	High	3.1	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	ADP (CISA-ADP)

CISA KEV Not listed.
EPSS 0.0060, the 49th percentile, on 15 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

9 Nov 2026, 09:15 UTC Confirmed by the CVE List
9 Nov 2026, 09:26 UTC First seen by agentprime
9 Nov 2026, 10:17 UTC Confirmed by NVD

Sources

References from the CNA

github.com/apache/airflow/pull/72718 patch
github.com/apache/airflow/pull/74829 patch
www.cve.org/CVERecord?id=CVE-2026-59242 related
lists.apache.org/thread.html/pwdwx354tv0x3m8wzfhh59r6wyztj2lk vendor-advisory

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.