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CVE-2026-76286 is a server-side request forgery vulnerability affecting custom API tools in Splunk MCP Server versions before 1.2.1. A user with the mcp_tool_admin capability can configure a custom API tool with an attacker-controlled destination. When another user with the mcp_tool_execute capability runs that tool, the server may send the executing user's Splunk platform authentication token to the configured destination. The destination's operator can capture the token and use it to access data and perform actions as the executing user.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.