CVE-2026-40961
📛 CVE Title
Apache Airflow: Open Redirect Bypass Vulnerability
Description
A bug in the login redirect route in Apache Airflow allowed authenticated users to craft URLs that bypassed the `is_safe_url` check, enabling redirection from a trusted Airflow domain to an attacker-controlled origin. Users are advised to upgrade to `apache-airflow` 3.2.2 or later. As a defense-in-depth mitigation, deployment operators can place Airflow behind a reverse proxy that strips off-domain `next=` query parameters before they reach the login endpoint.
Overview
- State
- PUBLISHED
- Assigner (CNA)
- apache
- CVSS severity
- high
- CVSS score
- 7.2 / 10
- CVSS vector
AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N- Effective score
- 7.2 / 10 HIGH source: CNA overview
- CWE(s)
-
CWE-601 - Reserved
- 2026-04-16
- Published
- 2026-06-01 07:55 UTC
- Last updated
- 2026-06-02 16:42 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/40xxx/CVE-2026-40961.json
- Linked Threat
- CVE-2026-40961 — CVE-2026-40961
NVD triage scoring NVD CVE 2.0
Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.
- NVD published
- 2026-06-01 09:16:18 UTC
- NVD last modified
- 2026-06-17 10:45:56 UTC
- NVD CVSS v3.1
- 7.2 / 10 HIGH source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
- NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N- Exploitability subscore
- 3.9 / 10
- Impact subscore
- 2.7 / 10
- EPSS score
- 0.0063 (probability of exploitation in next 30 days)
- EPSS percentile
- 45.63% vs all CVEs — higher = more likely to be exploited, as of 2026-07-06
NVD / KEV / EPSS data refreshed 2026-07-07 13:12 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2026-33597 - Assigner
- apache
- Published
- Jun 1, 2026, 7:55:04 AM
- Updated
- Jun 2, 2026, 4:42:33 PM
- EUVD base score (CVSS 3.1)
-
7.2 / 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N - EUVD-reported EPSS
- 0.6500
- Vendors
- Apache Software Foundation
- Products
-
Apache Airflow (3.0.0 <3.2.2)
- Aliases
-
GHSA-6hcw-qqr8-pjj8
ENISA description: A bug in the login redirect route in Apache Airflow allowed authenticated users to craft URLs that bypassed the `is_safe_url` check, enabling redirection from a trusted Airflow domain to an attacker-controlled origin. Users are advised to upgrade to `apache-airflow` 3.2.2 or later. As a defense-in-depth mitigation, deployment operators can place Airflow behind a reverse proxy that strips off-domain `next=` query parameters before they reach the login endpoint.
Affected products (1)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| Apache Software Foundation | Apache Airflow |
3.0.0 (affected)
|
— |
Affected products — CPE 2.3 (1) NVD
NVD's normalized CPE 2.3 matchers, used by vendor tools (vulnerability scanners, asset managers) for automated detection. Compare with the CNA's free-text "Affected products" section above.
cpe:2.3:a:apache:airflow:*:*:*:*:*:*:*:*
Vendor references (2)
References embedded in the original CVE record by the assigning CNA.
Web references (6)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
- http://www.openwall.com/lists/oss-security/2026/05/31/2 tenable:www.openwall.com
- https://github.com/apache/airflow/pull/65557 tenable:github.com
- https://lists.apache.org/thread/qmt8ksh7gty6b8hr9w294t94j36jdv1q tenable:lists.apache.org
- https://nvd.nist.gov/vuln/detail/CVE-2026-40961 tenable:nvd.nist.gov
- https://www.cve.org/CVERecord?id=CVE-2026-40961 tenable:www.cve.org
- https://www.first.org/epss/ tenable:www.first.org
NVD-tagged references (3)
Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.
- http://www.openwall.com/lists/oss-security/2026/05/31/2 af854a3a-2127-422b-91ae-364da2661108 Mailing ListThird Party Advisory
- https://github.com/apache/airflow/pull/65557 security@apache.org Issue TrackingPatch
- https://lists.apache.org/thread/qmt8ksh7gty6b8hr9w294t94j36jdv1q security@apache.org Mailing ListVendor Advisory
Remediations (19)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:app.opencve.io
Remediation No vendor fix or workaround currently provided. OpenCVE Recommended Actions Download and install the Microsoft security update that addresses CVE - 2026 -41096 for the relevant Windows 11 or Windows Server versions from the Microsoft Security Update Guide or Windows Update.
2026-06-08 15:51 UTC -
web:github.com
CVE ID: CVE - 2026 -41091 Vulnerability Type: Improper Link Resolution Before File Access (CWE-59 - Link Following) Affected Component: Microsoft Malware Protection Engine Root Cause: Defender fails to properly resolve links/junctions during cloud-tagged file remediation /rollback, allowing redirection of privileged writes. Impact: Local authenticated attacker can escalate from standard user to ...
2026-06-08 15:51 UTC -
web:mondoo.com
A bug in the login redirect route in Apache Airflow allowed authenticated users to craft URLs that bypassed the is_safe_url check, enabling redirection from a trusted Airflow domain to an attacker-controlled origin. Users are advised to upgrade to apache-airflow 3.2.2 or later. As a defense-in-depth mitigation , deployment operators can place Airflow behind a reverse proxy that strips off ...
2026-06-08 15:51 UTC -
web:nvd.nist.gov
An official website of the United States government NVD MENU
2026-06-08 15:51 UTC -
web:op-c.net
CISA added two actively exploited Microsoft Defender vulnerabilities, CVE - 2026 -41091 and CVE - 2026 -45498, to its KEV catalog. Learn the risks and recommended actions.
2026-06-08 15:51 UTC -
web:portal.msrc.microsoft.com
The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.
2026-06-08 15:51 UTC -
web:vulert.com
Learn about CVE-2026-40961 , an Open Redirect Bypass Vulnerability in Apache Airflow. Find out how to fix it and mitigate risks.
2026-06-08 15:51 UTC -
web:www.cisecurity.org
<p>Multiple vulnerabilities have been discovered in Microsoft products, the most severe of which could allow for remote code execution. Successful exploitation of the most severe of these vulnerabilities could result in an attacker gaining the same privileges as the logged-on user. Depending on the privileges associated with the user, an attacker could then install programs; view, change, or ...
2026-06-08 15:51 UTC -
web:www.csoonline.com
Microsoft released emergency fixes for two zero-day vulnerabilities in the malware protection components of Microsoft Defender. The flaws allow local attackers to gain system-level privileges or ...
2026-06-08 15:51 UTC -
web:www.securityweek.com
Microsoft this week released patches for two vulnerabilities in Defender, warning they have been exploited in the wild as zero-days. The first, tracked as CVE - 2026 -41091 (CVSS score of 7.8), is described as a link-following issue that allows attackers to elevate their privileges to System. "Improper link resolution before file access ('link following') in Microsoft Defender allows an ...
2026-06-08 15:51 UTC -
web:cybersecuritynews.com
Microsoft has officially acknowledged a critical zero-day vulnerability in Microsoft Defender, publicly dubbed "RoguePlanet," and confirmed it is actively developing a security patch to address the flaw.
2026-06-19 02:32 UTC -
web:msrc.microsoft.com
Security Update Guide - Microsoft Security Response Center
2026-06-19 02:32 UTC -
web:redmondmag.com
Microsoft June Patch Tuesday fixed 198 CVEs , including four urgent zero-day vulnerabilities. CVE - 2026 -41091 poses highest risk, with Microsoft Defender privilege escalation actively exploited.
2026-06-19 02:32 UTC -
web:support.microsoft.com
It includes updates from previous security and non-security releases, along with an additional fix . To learn more about differences between security updates, optional non-security preview updates, out-of-band (OOB) updates, and continuous innovation, see Windows monthly updates explained.
2026-06-19 02:32 UTC -
web:support.microsoft.com
Improvements This update includes new features and quality improvements that were part of the following update: May 12, 2026—KB5089548 (OS Build 28000.2113) May 26, 2026—KB5089570 (OS Build 28000.2179) This update addresses security vulnerabilities documented in the following guide: June 2026 Security Updates The following summary outlines key quality improvements addressed by this update ...
2026-06-19 02:32 UTC -
web:www.crowdstrike.com
Microsoft has released security updates for 130 vulnerabilities, including 30 critical, in its May 2026 Patch Tuesday rollout.
2026-06-19 02:32 UTC -
web:www.linkedin.com
Microsoft has confirmed that it is developing a security update to address a newly disclosed zero-day vulnerability in Microsoft Defender, following the public release of exploit code that ...
2026-06-19 02:32 UTC -
web:www.malwarebytes.com
Microsoft says it's working on a fix for an unpatched Defender vulnerability that can give attackers the highest level of access on Windows.
2026-06-19 02:32 UTC -
web:www.microsoft.com
Security Update Guide Notifications Microsoft's free Security Update Guide Notifications provide links to security-related software updates and notification of re-released security updates. These notifications are sent via email throughout the month as needed.
2026-06-19 02:32 UTC
AI Forensic Analysis
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Raw JSON
The full cvelistV5 record. Download as CVE-2026-40961.json.
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