Access-Control-Bypass

A critical vulnerability, CVE-2026-13442, in IBM Langflow OSS versions 1.0.0 through 1.10.1 enables an authenticated attacker to reuse other users' FAISS namespaces, leading to cross-user information disclosure of owner-only vector content and potential limited integrity impact via persistent poisoning of query results.

An HTTP request smuggling vulnerability, identified as CVE-2026-67182, in Rouille versions 0.3.3 through 3.6.2 allows remote attackers to bypass access controls by injecting bare line feed characters (0x0A) into client-supplied request header values, causing upstream backends to misinterpret subsequent data as a separate, attacker-controlled HTTP request.

A high-severity NoSQL injection vulnerability in Budibase's MongoDB datasource (npm/@budibase/server <= 3.38.1) allows an authenticated BASIC app user to bypass query-level access controls, enabling full collection dumps, arbitrary JavaScript execution via the MongoDB `$where` operator, cross-collection pivots, and arbitrary update/delete operations due to improper handling of Handlebars-enriched JSON queries.

An insecure direct object reference vulnerability (CVE-2026-65708) in sysPass versions up to 3.2.11 allows authenticated attackers to bypass access controls, accessing, enumerating, and manipulating account file attachments by manipulating numeric file IDs in `AccountFileController` actions without proper authorization checks, leading to unauthorized data access.

A high-severity vulnerability, CVE-2026-7189, in Proliz Software Ltd. Co.'s Proliz OBS before version 3.6.0 allows for the insertion of sensitive information into sent data, enabling attackers to access functionality not properly constrained by Access Control Lists (ACLs).

An authenticated Tailscale user can bypass IP-based access controls, rate limiting, and manipulate audit logs by injecting arbitrary X-Forwarded-For or X-Real-IP headers into proxied requests via `tsdproxy`. This vulnerability stems from `tsdproxy`'s failure to strip these headers before forwarding them, allowing an attacker to spoof their source IP address. This is particularly impactful when `tsdproxy` is the sole enforcement point for backend services, enabling actions such as gaining unauthorized admin access to backend applications.

The Scriban templating engine, specifically its `TypedObjectAccessor`, allows template code to write to arbitrary CLR object properties, including those with `private set`, `internal set`, and `init` modifiers, effectively bypassing intended C# access restrictions. This mass assignment (CWE-915) and access-modifier bypass (CWE-284) vulnerability can lead to unauthorized modification of sensitive host object properties, such as changing `user.is_admin = true`, with changes persisting after template rendering, affecting Scriban versions up to and including 7.2.1, with the `init` bypass specifically impacting .NET 5+.

Attackers can exploit Heimdall proxy versions <= 0.17.16 operating in proxy mode by injecting malicious values into the `Host` HTTP header, leading to the construction of a manipulated `Forwarded` header that can spoof client IP addresses for upstream services, potentially bypassing IP-based access controls.

MCP Server Kubernetes versions before 3.6.0 have an access control bypass vulnerability (CVE-2026-46519) where tool access controls are enforced only at the discovery layer, allowing authenticated clients to invoke any Kubernetes tool regardless of configured restrictions, potentially leading to cluster compromise.

Salvo web framework versions 0.39.0 through 0.89.2 are vulnerable to Path Traversal and Access Control Bypass, allowing unauthenticated external attackers to bypass proxy routing constraints and access unintended backend paths.

A critical vulnerability in @delmaredigital/payload-puck versions prior to 0.6.23 allows attackers to bypass collection-level access controls in PayloadCMS via the /api/puck/* endpoints due to improper access configuration, leading to unauthorized data manipulation.