CVE-2026-33858
Airflow webserver can execute arbitrary code via crafted XCom payload by trusted Dag Authors.
Is CVE-2026-33858 being exploited?
Not confirmed. CVE-2026-33858 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.59% probability of exploitation in the next 30 days.
How severe is CVE-2026-33858?
CVE-2026-33858 is rated High with a CVSS score of 8.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-33858?
Yes. A fix has been recorded for CVE-2026-33858. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-33858 affect?
CVE-2026-33858 affects Apache Airflow, Airflow webserver (XCom). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-33858?
Upgrade to Airflow 3.2.0
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Code execution in Airflow webserver via crafted XCom payload; trusted authors can compromise the server.
Patch when possible
- affected>= 3.1.8 and < 3.2.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.