# CVE-2026-40050: CrowdStrike LogScale Unauthenticated Path Traversal

> Remote attackers can read arbitrary files from the server filesystem via an unauthenticated path traversal in specific LogScale cluster API endpoints.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 21 Apr 2026
- **Updated:** 21 Apr 2026
- **Also known as:** GHSA-q4qj-hj7m-7jgx

## 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 (Missing Authentication for Critical Functionality), CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## 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.

## Is CVE-2026-40050 being exploited?

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

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-40050 and fix it if it is affected.

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

Affected product: CrowdStrike LogScale Self-Hosted. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-40050/ (Markdown: https://insights.sbomify.com/CVE-2026-40050/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-40050
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-40050
- OSV: https://osv.dev/vulnerability/CVE-2026-40050

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-40050/
Summaries are generated and may contain mistakes; the official description above is the record.