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CVE-2026-59243— Apache Airflow FAB provider: FAB auth manager: JWT signature verification disabled by default for Azure AD OAuth (`verify_signature` defaults to `False`)

Quick assessment

Affected
Apache Software Foundation Apache Airflow FAB provider
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apache Airflow FAB provider是Apache基金会的任务调度与编排平台的定义组件。 Apache Airflow FAB provider 3.7.3之前版本存在加密问题漏洞，该漏洞源于FAB auth manager的Azure AD OAuth登录在解码ID令牌时默认未验证签名，导致攻击者可以伪造或未签名的ID令牌绕过身份验证并登录为任意用户（包括管理员）。

AI Predicted 9.8 Difficulty: Easy EPSS 0.45% · P37

Affected Version Matrix 1

VendorProduct Version RangeStatus
Apache Software Foundation Apache Airflow FAB provider < 3.7.3 affected
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I. Basic Information for CVE-2026-59243

Vulnerability Information
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Vulnerability Title
Apache Airflow FAB provider: FAB auth manager: JWT signature verification disabled by default for Azure AD OAuth (`verify_signature` defaults to `False`)
Source: CVE Program / CVE List V5
Vulnerability Description
The FAB auth manager's Azure AD OAuth login defaulted `verify_signature=False` when decoding the ID token, so an attacker able to present a forged or unsigned (`alg:none`) ID token to the OAuth callback could bypass authentication and log in as an arbitrary user, including one holding the Admin role (CWE-347). Deployments running the FAB auth manager with the Azure AD OAuth login path under its default configuration are affected; the Authentik path already defaulted to `True`. This issue affects `apache-airflow-providers-fab` before 3.7.3. Users are advised to upgrade to `apache-airflow-providers-fab` 3.7.3, which defaults `verify_signature=True`.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
密码学签名的验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Apache Airflow FAB provider 加密问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache Airflow FAB provider是Apache基金会的任务调度与编排平台的定义组件。 Apache Airflow FAB provider 3.7.3之前版本存在加密问题漏洞，该漏洞源于FAB auth manager的Azure AD OAuth登录在解码ID令牌时默认未验证签名，导致攻击者可以伪造或未签名的ID令牌绕过身份验证并登录为任意用户（包括管理员）。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache Airflow FAB provider 0 ~ 3.7.3 -

II. Public POCs for CVE-2026-59243

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III. Intelligence Information for CVE-2026-59243

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Patches & Fixes for CVE-2026-59243 (1)

Mailing List Discussions for CVE-2026-59243 (1)

Same Patch Batch · Apache Software Foundation · 2026-07-29 · 41 CVEs total

CVE-2026-33267 10.0 CRITICAL Apache Traffic Server: Untrusted @ headers can spoof ATS internal metadata
CVE-2026-57834 10.0 CRITICAL Apache Traffic Server: Malformed chunked message body allows request smuggling
CVE-2026-58150 10.0 CRITICAL Apache Traffic Server: HTTP/2 requests with Transfer-Encoding are not rejected, allowing r
CVE-2026-58162 10.0 CRITICAL Apache Traffic Server: Certifier plugin trusts client SNI when generating certificates
CVE-2026-41920 9.3 CRITICAL Apache Traffic Server: SNI to Host header matching policy is not properly enforced
CVE-2026-58155 9.3 CRITICAL Apache Traffic Server: Header-name length truncation enables header aliasing and request s
CVE-2026-58154 8.9 HIGH Apache Traffic Server: Memory-safety errors in MIME and header parsing
CVE-2026-58157 8.7 HIGH Apache Traffic Server: Improper server-session reuse can expose data across client connect
CVE-2026-58182 8.6 HIGH Apache Traffic Server: ts_lua plugin has initialization and resource-handling errors
CVE-2026-58153 8.3 HIGH Apache Traffic Server: HTTP/2 to HTTP/1 conversion forwards origin trailers to clients uns
CVE-2026-22068 8.2 HIGH Apache Traffic Server: Regex mappings match with malicious domain names
CVE-2026-58188 8.2 HIGH Apache Traffic Server: Memory-safety and limit-bypass errors across experimental plugins
CVE-2026-58184 8.2 HIGH Apache Traffic Server: header_rewrite plugin cookie handling can corrupt memory
CVE-2026-58159 8.2 HIGH Apache Traffic Server: Listener and ACL handling allow access-control bypass
CVE-2026-58179 8.1 HIGH Apache Traffic Server: regex_remap plugin overflows the stack from attacker input
CVE-2026-58177 8.1 HIGH Apache Traffic Server: Memory-safety and path-traversal errors in the Cripts framework
CVE-2026-58178 7.5 HIGH Apache Traffic Server: ESI plugin allows uncontrolled recursion and server-side request fo
CVE-2026-58189 7.5 HIGH Apache Traffic Server: Plugins resetting the redirect counter enable SSRF amplification
CVE-2026-58186 7.5 HIGH Apache Traffic Server: webp_transform plugin decodes unsafely and mislabels degraded respo
CVE-2026-58151 7.5 HIGH Apache Traffic Server: Abusive HTTP/2 framing can exhaust resources and crash the server

Showing top 20 of 41 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Apache Airflow FAB provider
Same vendor: Apache Software Foundation
Same weakness: CWE-347

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