Security vulnerabilities, privacy incidents, safety concerns, and policy updates affecting LLMs and AI agents.
CVE-2026-26137 is a server-side request forgery vulnerability (SSRF, a flaw where an attacker tricks a server into making unwanted network requests on their behalf) in Microsoft 365 Copilot's Business Chat that allows an authorized attacker to gain elevated privileges over a network. The vulnerability affects an exclusively hosted service and was published on March 19, 2026.
CVE-2026-26136 is a command injection vulnerability (a flaw where an attacker can insert malicious commands by exploiting improper filtering of special characters) in Microsoft Copilot that allows an unauthorized attacker to access and disclose sensitive information over a network.
CVE-2026-24299 is a command injection vulnerability (a flaw where an attacker can insert malicious commands into an application by exploiting improper handling of special characters) in Microsoft 365 Copilot that allows an unauthorized attacker to disclose information over a network. The vulnerability has a CVSS 4.0 severity rating (a 0-10 scale measuring how serious a security flaw is). This is hosted exclusively as a service by Microsoft.
CVE-2026-26133 is a vulnerability in Microsoft 365 Copilot where an attacker can use AI command injection (tricking the AI system by embedding hidden commands in normal-looking input) to access and disclose information over a network without authorization. The vulnerability has a CVSS score (a 0-10 rating of how severe a security flaw is) of 4.0, indicating moderate severity.
Cloud CLI (a user interface for AI coding tools like Claude Code and Gemini-CLI) had a vulnerability before version 1.24.0 where attackers who had login access could run unauthorized commands on a computer by manipulating text inputs in Git-related features. This happened because the software used string interpolation (directly inserting user text into commands) without properly checking if the input was safe, which is a type of OS command injection (CWE-78, where an attacker tricks the system into executing arbitrary commands).
GitHub Copilot CLI had a vulnerability where attackers could execute arbitrary code by hiding dangerous commands inside bash parameter expansion patterns (special syntax for manipulating variables). The safety system that checks whether commands are safe would incorrectly classify these hidden commands as harmless, allowing them to run without user approval.
Microsoft's Semantic Kernel Python SDK has an RCE vulnerability (remote code execution, where an attacker can run commands on a system they don't own) in the `InMemoryVectorStore` filter functionality, which allows attackers to execute arbitrary code. The vulnerability affects the library used for building AI applications with vector storage (a database that stores AI embeddings, which are numerical representations of data).
CVE-2026-21523 is a time-of-check time-of-use (TOCTOU) race condition (a vulnerability where an attacker exploits the gap between when a system checks permissions and when it uses a resource) in GitHub Copilot and Visual Studio that allows an authorized attacker to execute code over a network. The vulnerability has not yet received a CVSS severity rating from NIST.
CVE-2026-21518 is a command injection vulnerability (a flaw where attackers can insert malicious commands into user input) in GitHub Copilot and Visual Studio Code that allows an unauthorized attacker to bypass security features over a network. The vulnerability stems from improper handling of special characters in commands. No CVSS severity score (a 0-10 rating of how serious a vulnerability is) has been assigned yet by NIST.
GitHub Copilot contains a command injection vulnerability (CVE-2026-21516), which is a flaw where special characters in user input are not properly filtered, allowing an attacker to execute code remotely on a system. The vulnerability was reported by Microsoft Corporation and has a CVSS score pending assessment.
CVE-2026-21257 is a command injection vulnerability (a flaw where attackers can insert malicious commands into an application) found in GitHub Copilot and Visual Studio that allows an authorized attacker to gain elevated privileges over a network. The vulnerability stems from improper handling of special characters in commands. As of the source date, a CVSS severity score (a 0-10 rating of how severe a vulnerability is) had not yet been assigned by NIST.
CVE-2026-21256 is a command injection vulnerability (a flaw where attackers can sneak malicious commands into input that a program then executes) found in GitHub Copilot and Visual Studio that allows unauthorized attackers to run code on a network. The vulnerability stems from improper handling of special characters in commands, which means the software doesn't properly filter or neutralize dangerous input before using it.
Microsoft's Semantic Kernel SDK (a tool for building AI agents that work together) had a vulnerability before version 1.70.0 that allowed attackers to write arbitrary files (files placed anywhere on a system) through the SessionsPythonPlugin component. The vulnerability has been fixed in version 1.70.0.
CVE-2026-24307 is a vulnerability in Microsoft 365 Copilot where improper validation of input (failure to check that data matches what the system expects) allows an attacker to access and disclose information over a network without authorization. The vulnerability has a CVSS score of 4.0 (a moderate severity rating on a 0-10 scale).
CVE-2026-21521 is a vulnerability in Microsoft Copilot where improper handling of escape sequences (special characters used to control how text is displayed or interpreted) allows an attacker to disclose information over a network without authorization. The vulnerability is classified as CWE-150 (improper neutralization of escape, meta, or control sequences) and was reported by Microsoft Corporation.
CVE-2026-21520 is a vulnerability in Microsoft Copilot Studio that allows an unauthenticated attacker to view sensitive information through a network-based attack. The vulnerability stems from improper handling of special characters in commands (command injection, where attackers manipulate input to execute unintended commands), and affects Copilot Studio's hosted service.
CVE-2025-64671 is a command injection vulnerability (a flaw where an attacker can inject malicious commands into input that gets executed) in Copilot that allows an unauthorized attacker to execute code locally on a system. The vulnerability stems from improper handling of special characters in commands, and Microsoft has documented it as a known issue.
CVE-2025-64660 is a vulnerability in GitHub Copilot and Visual Studio Code that involves improper access control (a flaw in how the software checks who is allowed to do what), allowing an authorized attacker to execute code over a network. The vulnerability has a CVSS 4.0 severity rating (a 0-10 scale measuring how serious a vulnerability is). This means someone with legitimate access to these tools could potentially run malicious code remotely.
CVE-2025-62453 is a vulnerability in GitHub Copilot and Visual Studio Code where improper validation of generative AI output (not properly checking what the AI generates) allows an authorized attacker to bypass a security feature on their local computer. The vulnerability is classified as a protection mechanism failure (CWE-693, a flaw in how security controls are designed).
Fix: This vulnerability is fixed in version 1.24.0. Users should update Cloud CLI to 1.24.0 or later.
NVD/CVE DatabaseFix: The fix adds two layers of defense: (1) The safety assessment now detects dangerous operators like @P, =, :=, and ! within ${...} expansions and reclassifies commands containing them from read-only to write-capable so they require user approval. (2) Commands with dangerous expansion patterns are unconditionally blocked at the execution layer regardless of permission mode. Update to GitHub Copilot CLI version 0.0.423 or later.
GitHub Advisory DatabaseFix: Upgrade to python-1.39.4 or higher. As a temporary workaround, avoid using `InMemoryVectorStore` for production scenarios.
GitHub Advisory DatabaseMicrosoft Configuration Manager has an SQL injection vulnerability (a type of attack where specially crafted input tricks a database into running unintended commands), allowing unauthenticated attackers to send malicious requests that could let them execute commands on the server or database. This vulnerability is currently being actively exploited by real attackers.
Fix: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CISA Known Exploited VulnerabilitiesFix: Update to Microsoft.SemanticKernel.Core version 1.70.0. Alternatively, users can create a Function Invocation Filter (a check that runs before function calls) which inspects the arguments passed to DownloadFileAsync or UploadFileAsync and ensures the provided localFilePath is allow listed (checked against an approved list of file paths).
NVD/CVE Database