CrowdStrike LogScale Unauthenticated Path Traversal

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Summary

CVECVE-2026-40050
StatePUBLISHED
AssignerCrowdStrike
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-21 17:16:53 UTC
Updated2026-04-21 17:16:53 UTC
DescriptionCrowdStrike 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.

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from 13ddcd98-6f4a-40a8-8e24-29ca0aee4661

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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

VersionSourceTypeScoreSeverityVector
3.113ddcd98-6f4a-40a8-8e24-29ca0aee4661Secondary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNACVSS9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA CrowdStrike LogScale Self-Hosted affected 1.224.0 1.235.0 semver Not specified

References

ReferenceSourceLinkTags
www.crowdstrike.com/en-us/security-advisories/cve-2026-40050 13ddcd98-6f4a-40a8-8e24-29ca0aee4661 www.crowdstrike.com
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