Dashboard / CVE-2026-111421

CVE-2026-111421

HIGH
MEDIUM Priority: 0.05 BB Relevance: 68/100
Published: 2026-11-09 Modified: 2026-11-10 First seen: 2026-11-09 Status: active

Attack Surface

Network Low Complexity No Interaction Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Network
AC: Low
PR: Low
UI: None
S: Unchanged
C: High
I: High
A: High

Description

Apache Airflow's Task Execution API stored XCom values written by a task without the reserved-key check applied elsewhere, so a Dag author's task could write an XCom that, when a user later viewed it through the API with deserialization enabled, made the API server instantiate classes from the `airflow.*` namespace with arguments the Dag author chose. This is an incomplete fix for CVE-2026-59242: users who applied that fix in apache-airflow 3.3.1 remain affected through this route and should upgrade to apache-airflow 3.4.0 or later.

Weakness Classification (1)

Affected Software (2)

VendorProductVersion
Apache Software Foundation Apache Airflow 3.0.0 < 3.4.0
Apache Software Foundation Apache Airflow 3.0.0 < 3.4.0

References & Advisories (4)

Bug Bounty Relevance

68 / 100
✓ Network accessible
✓ Low complexity
✓ No user interaction

CVSS Score

8.8 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploitation Probability

0.60%
Raw Score 0.006040
Percentile 49.5%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00604
2026-11-12
0.00604
2026-11-10
0.00604

Intelligence Sources

mitre ref →
nvd ref →

External Links