{"id":82674,"date":"2026-07-29T13:46:44","date_gmt":"2026-07-29T10:16:44","guid":{"rendered":"https:\/\/afaghhosting.net\/blog\/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\/"},"modified":"2026-07-29T13:46:44","modified_gmt":"2026-07-29T10:16:44","slug":"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","status":"publish","type":"post","link":"https:\/\/afaghhosting.net\/blog\/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\/","title":{"rendered":"CVE-2026-59243 &#8211; Apache Airflow FAB provider: FAB auth manager: JWT signature verification disabled by default for Azure AD OAuth (`verify_signature` defaults to `False`)"},"content":{"rendered":"<p>CVE ID :CVE-2026-59243<\/p>\n<p>  Published : July 29, 2026, 10:16 a.m. | 24\u00a0minutes ago<\/p>\n<p>  Description :The FAB auth manager&#8217;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`.<\/p>\n<p>  Severity: 0.0 | NA<\/p>\n<p>  Visit the link for more details, such as CVSS details, affected products, timeline, and more&#8230;\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"<p>CVE ID :CVE-2026-59243 Published : July 29, 2026, 10:16 a.m. | 24\u00a0minutes ago Description :The FAB auth manager&#8217;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 &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-82674","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/82674","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/comments?post=82674"}],"version-history":[{"count":0,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/82674\/revisions"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=82674"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=82674"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=82674"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}