CVE-2026-40050 CrowdStrike LogScale Unauthenticated Path Traversal

What is CVE-2026-40050?

CVE-2026-40050 is a critical path traversal vulnerability in CrowdStrike LogScale Self-Hosted, published on 21 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-306, CWE-22

Which versions are affected by CVE-2026-40050?

How do I fix CVE-2026-40050?

No fix has been published for CVE-2026-40050 yet. Limit exposure of the affected software until one is available.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2026-40050 being exploited?

There is no known exploitation of CVE-2026-40050 in the wild and no public exploit code.

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-q4qj-hj7m-7jgx.