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🟠 High | Source: Microsoft Security Response Center CVE-2026-57211 is a Server-Side Request Forgery (SSRF) vulnerability affecting the RabbitMQ management UI when running on Windows, with implications for Azure-hosted deployments. SSRF flaws allow an attacker to trick the server into making unintended network requests, potentially exposing internal resources or metadata services. This is particularly concerning in cloud environments where instance metadata endpoints can be leveraged to escalate privileges or extract credentials. ...

🟠 High | Source: Microsoft Security Response Center A vulnerability in RabbitMQ (CVE-2026-57216) allows remote attackers to establish guest sessions by bypassing loopback enforcement checks across the AMQP 1.0, AMQP 0-9-1, and Stream protocols. By default, RabbitMQ restricts guest user access to loopback (localhost) connections only, but this flaw undermines that control. This matters because it could grant unauthenticated or low-privilege remote access to RabbitMQ brokers that were assumed to be protected by loopback restrictions. ...

🟠 High | Source: Microsoft Security Response Center CVE-2026-57213 is a stored cross-site scripting (XSS) vulnerability in RabbitMQ’s federation management plugin, caused by unsanitised rendering of the consumer_tag field. An attacker who can influence consumer_tag values could inject malicious scripts that execute in the browsers of users viewing the RabbitMQ management UI. This is particularly relevant in Azure environments where RabbitMQ is used as a message broker, as exploitation could lead to session hijacking or credential theft. ...

🟠 High | Source: Microsoft Security Response Center CVE-2026-57217 is a vulnerability in RabbitMQ’s topic authorisation mechanism that allows a tenant’s messages to be routed to another tenant’s queues by manipulating routing keys. This breaks the isolation boundary between tenants sharing a RabbitMQ deployment, which is a common pattern in Azure-hosted messaging architectures. An attacker with access to one tenant context could potentially read or inject messages intended for another tenant. ...

🟠 High | Source: Microsoft Security Response Center A vulnerability in RabbitMQ’s stream listener allows unauthenticated attackers to send oversized frames during the authentication handshake, bypassing the configured frame-size limit. This can exhaust server memory, causing a denial-of-service condition without any credentials being required. The flaw is particularly concerning because it can be triggered before any authentication takes place, lowering the bar for exploitation significantly. Security Architect’s Take: Review any Azure-hosted or Azure-integrated RabbitMQ deployments — particularly those exposing the stream protocol port (5552) — and apply vendor patches immediately. As an interim control, restrict network access to the RabbitMQ stream listener to trusted IP ranges only, using NSGs or equivalent perimeter controls. ...

🟠 High | Source: Microsoft Security Response Center CVE-2026-64188 is a use-after-free vulnerability in the Linux kernel’s Qualcomm RmNet network driver, specifically in the rmnet_dellink() function. Use-after-free flaws occur when a programme continues to reference memory after it has been freed, potentially allowing an attacker to execute arbitrary code or cause a system crash. This vulnerability has been flagged by Microsoft’s Security Response Centre in the context of Azure, suggesting it affects Linux-based virtual machines or infrastructure running on Azure. ...

🟠 High | Source: Microsoft Security Response Center CVE-2026-64189 is a race condition vulnerability in the Linux kernel’s netfilter ipset subsystem, specifically between dump operations and ip_set_list resize actions. This type of flaw can lead to memory corruption or information disclosure, and is relevant to Azure environments running Linux-based workloads where the kernel netfilter stack is in use. Microsoft has published this advisory through the MSRC, indicating it affects Azure infrastructure or supported Linux guest configurations. ...

🟠 High | Source: Microsoft Security Response Center CVE-2026-64192 addresses a flaw in the Linux kernel’s BPF (Berkeley Packet Filter) subsystem, specifically in how inode storage maps are created when the BPF Linux Security Module (LSM) is not properly initialised. If exploited, this could allow unintended behaviour or security bypass in environments relying on BPF-based security controls. The fix enforces a rejection of BPF_MAP_TYPE_INODE_STORAGE creation when the BPF LSM is uninitialised, closing a potential gap in kernel-level security enforcement. ...

🟠 High | Source: Microsoft Security Response Center CVE-2026-26199 is a buffer underflow vulnerability in the HDF5 library functions H5Iget_name and H5G_get_name, triggered when a size parameter of zero is passed. This class of memory corruption flaw can potentially be exploited to read out-of-bounds memory or cause unexpected behaviour in applications processing HDF5 data. Microsoft has published this advisory through the MSRC, indicating relevance to Azure services or components that depend on HDF5. ...

🟠 High | Source: Microsoft Security Response Center CVE-2026-26197 is a vulnerability in the HDF5 library’s H5Odtype.c file, where the array’s full size, element count, and element size are not validated to ensure they are consistent with one another. This mismatch can lead to memory corruption or out-of-bounds access, potentially allowing an attacker to crash an application or execute arbitrary code. It affects services or workloads running on Azure that process HDF5 data files. ...