CVE-2026-74763: 
Linux Debian Analyse et atténuation de la vulnérabilité

CVE-2026-74763 is an authorization bypass vulnerability in Apache Shiro where authorization annotations are not always enforced, depending on where they are placed in application code. The vulnerability was disclosed on November 14, 2026, via the Apache security mailing list. Affected software is Apache Shiro, with a patch made available on the same date as disclosure. The CVSS category is estimated as Medium severity (Apache Advisory, Feedly).

The root cause of this vulnerability is improper enforcement of authorization annotations in Apache Shiro, classified as an authorization bypass (CWE-285 or similar improper authorization weakness). Depending on the placement of Shiro's authorization annotations within application code, the framework may fail to evaluate and enforce them, allowing requests to proceed without the required permission or role checks. An attacker — authenticated or unauthenticated — can craft requests targeting endpoints or methods where annotations are not enforced, effectively bypassing access controls. No public technical write-up or proof-of-concept code has been identified at this time (Apache Advisory, Feedly).

Successful exploitation allows an unauthenticated or authenticated attacker to bypass authorization checks and access protected resources or perform restricted operations that should require specific permissions or roles. This directly impacts confidentiality and integrity, as attackers may read sensitive data or execute privileged actions without authorization. The scope of impact depends on the application's use of Shiro annotations and the sensitivity of the protected resources (Apache Advisory, Feedly).

There is no evidence of public proof-of-concept exploit code or active in-the-wild exploitation as of the disclosure date. The CVE status remains "Reserved" and no CISA KEV catalog listing has been identified. The EPSS score is not yet available. The attack type is authorization bypass, which generally requires knowledge of the application's endpoint structure but may not require authentication (Feedly).

Update Apache Shiro to the patched version released on November 14, 2026, as detailed in the Apache Shiro Security Advisory. As an interim measure, review application code to ensure authorization annotations are placed in locations where Shiro's enforcement is guaranteed, following Shiro's official documentation on annotation placement. Additionally, audit access logs to identify any unauthorized access to protected resources that may have occurred prior to patching (Apache Advisory, Feedly).

The vulnerability was noted on the OSS-Security mailing list and received brief social media attention on Bluesky shortly after disclosure. Security intelligence firm Brandefense published a summary as part of their Apache Shiro November 2026 advisories coverage. Community reaction appears measured given the Medium severity rating and absence of public exploits (OSS-Sec, Brandefense).