VulnerabilityPublished 1 Jun 2026Updated 2 Jun 2026

CVE-2026-40961: Apache Airflow · URL Redirection to Untrusted Site

Affects Apache AirflowSource CVE Database V5

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Not known to be exploited · CVSS 7.2 High : upgrade to 3.2.2 soon.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score

7.2High

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.6% chance of exploitation in 30 days – higher than 51% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 3.2.2

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Changed
Confidentiality: Low
Integrity: Low
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Changed: An exploited vulnerability can affect resources beyond the security scope managed by the security authority of the vulnerable component. In this case, the vulnerable component and the impacted component are different and managed by different security authorities.
Confidentiality: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the impacted component.
Integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact on the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 1 Jun 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade Apache Airflow to 3.2.2.

Affected software

Product	Affected	Fixed in
Apache Software FoundationApache Airflow	Affected >=3.0.0 <3.2.2	Fixed in 3.2.2
PyPIapache-airflow`pkg:pypi/apache-airflow`Other threats	Affected =3.0.0	Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Users should upgrade Apache Airflow to version 3.2.2 or later, where this vulnerability is fixed. As a defense-in-depth measure, deployment operators can configure a reverse proxy in front of Airflow to strip off-domain next= query parameters before they reach the login endpoint. Patch status is not explicitly confirmed in the provided data, but the vendor advisory recommends upgrading to 3.2.2 or later, indicating an official fix is available.

Description

CVE-2026-40961 is a high-severity open redirect vulnerability in Apache Airflow version 3.0.0. It allows authenticated users to bypass the is_safe_url check in the login redirect route, enabling redirection from a trusted Airflow domain to attacker-controlled sites. This can lead to phishing or other malicious redirection attacks. Users are advised to upgrade to Apache Airflow 3.2.2 or later. As a defense-in-depth measure, operators can use a reverse proxy to strip off-domain next= query parameters before they reach the login endpoint.

Impact

Successful exploitation allows authenticated users to redirect legitimate Airflow users to attacker-controlled sites, potentially facilitating phishing or other malicious activities that compromise confidentiality and integrity of user sessions. There is no direct impact on availability. The vulnerability affects confidentiality and integrity with a scope change, as indicated by the CVSS vector.

Summary

This vulnerability in Apache Airflow 3.0.0 involves the login redirect route where authenticated users can craft URLs that circumvent the is_safe_url validation. This flaw enables redirection from a trusted Airflow domain to an untrusted, attacker-controlled origin, classified as CWE-601 (URL Redirection to Untrusted Site). The CVSS 3.1 base score is 7.2, indicating high severity with network attack vector, low attack complexity, no privileges or user interaction required, and impacts confidentiality and integrity with scope change. The vendor recommends upgrading to version 3.2.2 or later. Additionally, deployment operators can mitigate risk by placing Airflow behind a reverse proxy that removes off-domain next= parameters before login processing.

CWE-601URL Redirection to Untrusted Site (Open Redirect) (opens in a new tab)
Base weaknessLikelihood of exploit: LowOWASP Top 10 A01:2025: Broken Access Control (opens in a new tab)
The web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a redirect.
Implementation · Input Validation
Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
Architecture and Design
Use an intermediate disclaimer page that provides the user with a clear warning that they are leaving the current site. Implement a long timeout before the redirect occurs, or force the user to click on the link. Be careful to avoid XSS problems (CWE-79) when generating the disclaimer page.
Architecture and Design · Enforcement by Conversion
When the set of acceptable objects, such as filenames or URLs, is limited or known, create a mapping from a set of fixed input values (such as numeric IDs) to the actual filenames or URLs, and reject all other inputs.
OWASP Cheat Sheets
Mass Assignment (opens in a new tab)
Authorization (opens in a new tab)
OWASP ASVS 4.0.3
V5.1.5 (opens in a new tab)
Attack patterns
Cross-Site Flashing (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 8 Jul 2026, 13:38 UTC

WeaknessesCWE-601

Technical details

References

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