CVE-2026-42213 SolidCAM-GPPL-IDE: Path traversal in `inc` directive enables file probing and NTLM-hash leak
Attackers can exploit path traversal in the inc directive to probe file existence and leak NTLM hashes via UNC paths in the SolidCAM-GPPL-IDE extension.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-42213?
CVE-2026-42213 is a medium-severity path traversal vulnerability in anzory SolidCAM-GPPL-IDE, published on 8 May 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
SolidCAM-GPPL-IDE is an unofficial, independently developed extension, Postprocessor IDE for SolidCAM. From version 1.0.0 to before version 1.0.2, the inc "filename" directive in GPPL postprocessor files is resolved by GpplDocumentLinkHandler into a clickable link (VS Code textDocument/documentLink). The handler accepted arbitrary paths — absolute, relative with parent-directory segments (..\..\..\), UNC (\\server\share\), and arbitrary subfolders — and called File.Exists on each to decide whether to render the link. Two distinct attack surfaces resulted: information disclosure via File.Exists probing and NTLM hash leak via UNC path probing. This issue has been patched in version 1.0.2.
Which versions are affected by CVE-2026-42213?
How do I fix CVE-2026-42213?
No fix has been published for CVE-2026-42213 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-2026-42213 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-42213 exists.
Sources
Also known as GHSA-xvpx-9p39-g62m.