CVE-2026-55956
Improper Authorization vulnerability in Apache Tomcat leads to security constraints specified for the default servlet ignoring any method or
CVSS
6.5
Medio
EPSS
0.4%
p33
KEV
—
Exploit Today
10
0-100
Publicado: 29 jun 2026 · Última mod.: 2 jul 2026 · CWE-285
0.2%EPSS · 30 días0.4%
2026-06-302026-07-20
Improper Authorization vulnerability in Apache Tomcat leads to security constraints specified for the default servlet ignoring any method or method omission configured as part of the constraint. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.22, from 10.1.0-M1 through 10.1.55, from 9.0.0.M1 through 9.0.118, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other versions that have reached end of support may also be affected. Users are recommended to upgrade to version 11.0.23, 10.1.56 or 9.0.119, which fix the issue.
CVECVSSEPSSKEVRExplotTítuloVis.
CVE-2026-491707.8 ALT84.9%
——25Insufficient granularity of access control in Windows StateRepository API allows an authorized attacker to elevate privileges locally.4dCVE-2026-331869.1 CRÍ72.5%
——22gRPC-Go is the Go language implementation of gRPC. Versions prior to 1.79.3 have an authorization bypass resulting from improper input validation of the HTTP/2 `:path` pseudo-header. The gRPC-Go server was too lenient in its routing logic, accepting requests where the `:path` omitted the mandatory leading slash (e.g., `Service/Method` instead of `/Service/Method`). While the server successfully routed these requests to the correct handler, authorization interceptors (including the official `grpc/authz` package) evaluated the raw, non-canonical path string. Consequently, "deny" rules defined using canonical paths (starting with `/`) failed to match the incoming request, allowing it to bypass the policy if a fallback "allow" rule was present. This affects gRPC-Go servers that use path-based authorization interceptors, such as the official RBAC implementation in `google.golang.org/grpc/authz` or custom interceptors relying on `info.FullMethod` or `grpc.Method(ctx)`; AND that have a security policy contains specific "deny" rules for canonical paths but allows other requests by default (a fallback "allow" rule). The vulnerability is exploitable by an attacker who can send raw HTTP/2 frames with malformed `:path` headers directly to the gRPC server. The fix in version 1.79.3 ensures that any request with a `:path` that does not start with a leading slash is immediately rejected with a `codes.Unimplemented` error, preventing it from reaching authorization interceptors or handlers with a non-canonical path string. While upgrading is the most secure and recommended path, users can mitigate the vulnerability using one of the following methods: Use a validating interceptor (recommended mitigation); infrastructure-level normalization; and/or policy hardening.15hCVE-2026-541218.8 ALT52.6%
——16Improper authorization in Active Directory Certificate Services (AD CS) allows an authorized attacker to elevate privileges over a network.6dCVE-2026-582778.8 ALT50.6%
——15Improper authorization in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.5dCVE-2026-550777.2 ALT45.5%
——14Coder allows organizations to provision remote development environments via Terraform. Prior to versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2, the `PUT /api/v2/users/{user}/password` endpoint authorized only `ActionUpdatePersonal` and did not prevent a `user-admin` from resetting an `owner` account's password. It also did not require the current password when an admin reset another user's password. Exploitation requires the privileged `user-admin` role so practical risk is limited to deployments that grant `user-admin` to less trusted operators. The fix in versions 2.29.7, 2.32.7, 2.33.8, and 2.34.2 prevents non-owner users from resetting the password of an account that holds the `owner` role. As a workaround, restrict the `user-admin` role to trusted administrators.11dCVE-2025-615247.2 ALT45.4%
——14An issue in the permission verification module and organization/application editing interface in Casdoor v2.26.0 and before, and fixed in v.2.63.0, allows remote authenticated administrators of any organization within the system to bypass the system's permission verification mechanism by directly concatenating URLs after login16d