What is CVE-2026-22561?

CVE-2026-22561 is a high-severity vulnerability in Anthropic Claude, classified under Uncontrolled Search Path Element. CVSS score: 7.8/10. Published 2026-03-31.

How severe is CVE-2026-22561?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Anthropic Claude

CVE-2026-22561

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 it…

EPSS: 0.000 (0.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Anthropic Claude
Anthropic Claude Desktop - Windows — versions 0
Microsoft Windows

Weakness classification (CWE)

CWE-427 — Uncontrolled Search Path Element

References

support@hackerone.com (Vendor Advisory)

Frequently asked questions

What is CVE-2026-22561?: CVE-2026-22561 is a high-severity vulnerability in Anthropic Claude, classified under Uncontrolled Search Path Element. CVSS score: 7.8/10. Published 2026-03-31.
How severe is CVE-2026-22561?: High severity. CVSS v3 base score is 7.8 out of 10.