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CVE-2023-40273

Session fixation in Apache Airflow web interface

HIGH
8
CVSS Score
Published: August 23, 2023 at 03:37 PM UTC
Updated: June 17, 2026 at 06:16 AM UTC
1 product affected across 1 vendorAirflow

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Severity
HIGH8
Exploit prediction
EPSS 2%
SSVC
No known exploit

Description

The session fixation vulnerability allowed the authenticated user to continue accessing Airflow webserver even after the password of the user has been reset by the admin - up until the expiry of the session of the user. Other than manually cleaning the session database (for database session backend), or changing the secure_key and restarting the webserver, there were no mechanisms to force-logout the user (and all other users with that). With this fix implemented, when using the database session backend, the existing sessions of the user are invalidated when the password of the user is reset. When using the securecookie session backend, the sessions are NOT invalidated and still require changing the secure key and restarting the webserver (and logging out all other users), but the user resetting the password is informed about it with a flash message warning displayed in the UI. Documentation is also updated explaining this behaviour. Users of Apache Airflow are advised to upgrade to version 2.7.0 or newer to mitigate the risk associated with this vulnerability.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Airflow· Apachepypi
95%
v ≤ 2.7.0v < 2.7.0
Affected range stops below 2.7.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

PatchThird Party Advisory
Source: [email protected]
https://github.com/apache/airflow/pull/33347
Vendor Advisory
Source: [email protected]
https://lists.apache.org/thread/9rdmv8ln4y4ncbyrlmjrsj903x4l80nj
Mailing ListThird Party Advisory
Source: [email protected]
https://www.openwall.com/lists/oss-security/2023/08/23/1

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8HIGHCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-384

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