CVE-2026-25917Network attack vector

Webserver code execution via XCom extra-link deserialization

Published Apr 18, 2026 · Updated Apr 18, 2026

Deserialization in Apache Airflow before 3.2.0 allows remote authenticated DAG authors to execute arbitrary code in the webserver context. OperatorLink.get_link passes an XCom-backed extra-link value to XComModel.deserialize_value, which can instantiate an attacker-selected class. Exploitation requires DAG-author privileges and a request that renders the crafted operator extra link; code runs with the webserver's permissions.

CVSS severity7.2
High
EPSS probability0.82%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Deserialization in Apache Airflow before 3.2.0 allows remote authenticated DAG authors to execute arbitrary code in the webserver context. OperatorLink.get_link passes an XCom-backed extra-link value to XComModel.deserialize_value, which can instantiate an attacker-selected class. Exploitation requires DAG-author privileges and a request that renders the crafted operator extra link; code runs with the webserver's permissions.

The record

CVE
CVE-2026-25917
Published
Apr 18, 2026
Updated
Apr 18, 2026
Vendor
The Apache Software Foundation
Product
Apache Airflow
Classifications
CWE-502, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <3.2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Apache Software Foundation · Apache Airflowversion=0 <3.2.0

Published CVSS scores

7.2CISA-ADPCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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