GCD AI RADAR
incidents/AIR-2026-0352

RCE Vulnerability in Microsoft Semantic Kernel Search Plugin

Attack on AI1 Research / proof of conceptPrompt injectionInfrastructure vulnerabilityAgent hijack

Researchers discovered a path in Microsoft Semantic Kernel where a single prompt injection could lead to host-level remote code execution. The vulnerability affects agents using the Search Plugin backed by the In-Memory Vector Store.

Details

type
Attack on AI
An AI model, agent or AI-powered product was the thing exploited, abused or leaked.
categories
  • Prompt injectionprimary
    Untrusted content (web pages, documents, emails, tool output) steers a model into ignoring its instructions.
  • Infrastructure vulnerability
    CVEs and advisories in AI frameworks, inference servers, MCP servers, AI developer tools and hosting stacks.
  • Agent hijack
    An AI agent is tricked into unauthorized actions: tool misuse, data exfiltration through the agent, or acting against its principal.
owasp llm top 10
mitre atlas
Both rows are derived from the type and categories (OWASP 2025 edition, ATLAS release 2026.09), not classified per record. How
severity
1 · Research / proof of concept
Demonstrated by researchers; no known real-world exploitation.
targets
Microsoft, Framework / tooling
products
Semantic Kernel
incident date
7 May 2026
first reported
19 Feb 2026
origin
MITRE ATLAS
Derived from MITRE ATLAS (Apache 2.0, © MITRE).
classifier confidence
0.95 · published at or above 0.80; see the methodology
tags
semantic-kernel · rce · microsoft · CVE-2026-26030
record
created 2026-10-18 06:55Z · updated 2026-10-18 07:00Z · json

Sources · 4

  1. 2026-02-19
    CVE-2026-26030: Microsoft Semantic Kernel InMemoryVectorStore filter functionality vulnerable to remote code execution
    GitHub Advisory Database · github.com/advisories/GHSA-xjw9-4gw8-4rqx
  2. 2026-06-30
    RCE Vulnerability in Semantic Kernel Search Plugin
    MITRE ATLAS · atlas.mitre.org/studies/AML.CS0062
  3. 2026-06-30
    When prompts become shells: RCE vulnerabilities in AI agent frameworks
    Microsoft Security · microsoft.com/en-us/security/blog/2026/05/07/prompts-become-shells-rce-vulnerabi
  4. 2026-06-30
    CVE-2026-26030
    cve.org · cve.org/CVERecord?id=CVE-2026-26030

Titles and links belong to their publishers. The summary above is written by GCD AI RADAR in its own words; data is CC BY-SA 4.0.

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