CVE-2026-22561

HIGH 7.8CVE-2026-22561 · Published 31/03/2026 · updated 24/07/2026

In short

CVE-2026-22561 is a HIGH (CVSS 7.8) vulnerability affecting claude (anthropic).
Chance of exploitation in the next 30 days (EPSS): 0.18%, higher than 8.0% of all vulnerabilities.
Fix: update to 1.1.3363 or later.

Package	Affected versions	Patched versions
claude anthropic	`< 1.1.3363`	`1.1.3363`

Description

Uncontrolled search path elements in Anthropic Claude for Windows installer (Claude Setup.exe) versions prior to 1.1.3363 allow local privilege escalation via DLL search-order hijacking. The installer loads DLLs (e.g., profapi.dll) from its own directory after UAC elevation, enabling arbitrary code execution if a malicious DLL is planted alongside the installer.

References

trust.anthropic.com/resources · Vendor Advisory

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