CVE-2026-28779Network attack vector

Session takeover via root-scoped authentication cookie

Published Mar 17, 2026 · Updated Mar 17, 2026

Session token exposure in Apache Airflow 3.0.0 through 3.1.7 allows remote attackers to hijack sessions through co-hosted applications. The login flow sets the _token cookie Path attribute to / instead of deriving the configured webserver or API base_url subpath, so browsers send the token to every application on the domain. Exploitation requires an Airflow deployment below the domain root and an attacker-controlled or compromised co-hosted application; captured tokens grant the victim's full Airflow session.

CVSS severity7.5
High
EPSS probability0.68%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Session token exposure in Apache Airflow 3.0.0 through 3.1.7 allows remote attackers to hijack sessions through co-hosted applications. The login flow sets the _token cookie Path attribute to / instead of deriving the configured webserver or API base_url subpath, so browsers send the token to every application on the domain. Exploitation requires an Airflow deployment below the domain root and an attacker-controlled or compromised co-hosted application; captured tokens grant the victim's full Airflow session.

The record

CVE
CVE-2026-28779
Published
Mar 17, 2026
Updated
Mar 17, 2026
Vendor
The Apache Software Foundation
Product
Apache Airflow
Classifications
CWE-668, T1539
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 17, 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=3.0.0 <3.1.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache Airflowversion=3.0.0 <3.1.8

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-668Exposure of Resource to Wrong Sphere
T1539Steal Web Session Cookie

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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