CVE-2026-40050

CrowdStrike LogScale Unauthenticated Path Traversal

State: Published
Severity: 9.8 Critical
Published: Apr 21, 2026
Updated: Apr 21, 2026
Reserved: Apr 8, 2026

Description

CrowdStrike has released security updates to address a critical unauthenticated path traversal vulnerability (CVE-2026-40050) in LogScale. This vulnerability only requires mitigation by customers that host specific versions of LogScale and does not affect Next-Gen SIEM customers. The vulnerability exists in a specific cluster API endpoint that, if exposed, allows a remote attacker to read arbitrary files from the server filesystem without authentication.

Next-Gen SIEM customers are not affected and do not need to take any action. CrowdStrike mitigated the vulnerability for LogScale SaaS customers by deploying network-layer blocks to all clusters on April 7, 2026. We have proactively reviewed all log data and there is no evidence of exploitation.

LogScale Self-hosted customers should upgrade to a patched version immediately to remediate the vulnerability.

CrowdStrike identified this vulnerability during continuous and ongoing product testing.

Scores

CVSS	Score	Vector	Source
3.1	9.8 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	CrowdStrike

Weaknesses

CWE-306 Missing authentication for critical function
CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Affected Products

Product	Versions
LogScale Self-HostedCrowdStrike	1.224.0 through 1.235.0Affectedfrom 1.233.1, 1.234.1, 1.235.1, 1.228.2Not affected

References

https://www.crowdstrike.com/en-us/security-advisories/cve-2026-40050/

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