CVE-2026-40503 OpenHarness Path Traversal Information Disclosure via /memory show
Remote users can read arbitrary files via path traversal in the /memory show command, exposing sensitive data to attackers.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-40503?
CVE-2026-40503 is a high-severity path traversal vulnerability in HKUDS OpenHarness, published on 16 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
OpenHarness prior to commit dd1d235 contains a path traversal vulnerability that allows remote gateway users with chat access to read arbitrary files by supplying path traversal sequences to the /memory show slash command. Attackers can manipulate the path input parameter to escape the project memory directory and access sensitive files accessible to the OpenHarness process without filesystem containment validation.
Weakness: CWE-22
Which versions are affected by CVE-2026-40503?
It affects 1 product.
Products include Hkuds Openharness.
How do I fix CVE-2026-40503?
No fix has been published for CVE-2026-40503 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-2026-40503 being exploited?
There is no known exploitation of CVE-2026-40503 in the wild and no public exploit code.
Other vulnerabilities in HKUDS OpenHarness
- CVE-2026-7551 HKUDS OpenHarness Remote Command Execution via /bridge Slash Command
- CVE-2026-6819 HKUDS OpenHarness Plugin Management Command Exposure
- CVE-2026-40515 OpenHarness Permission Bypass via grep and glob root argument
- CVE-2026-40502 OpenHarness Remote Administrative Command Injection via Gateway Handler
- CVE-2026-6823 HKUDS OpenHarness Insecure Default Remote Channel Allowlist
Sources
Also known as GHSA-fwhx-4vqr-m9gj.