How severe is CVE-2026-40503?

CVE-2026-40503 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-40503 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-40503?

CVE-2026-40503 affects Hkuds Openharness. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-40503?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-40503 have an EU (EUVD) identifier?

Yes. CVE-2026-40503 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-23143.

When was CVE-2026-40503 published?

CVE-2026-40503 was published on 2026-04-16 and last updated on 2026-06-17.

CVE-2026-40503

CVE-2026-40503 is a medium-severity vulnerability in Hkuds Openharness with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v4: 7.1
EPSS exploit prediction: 0% (33rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-23143
Weakness: CWE-22
Affected product: Hkuds Openharness
Published: 2026-04-16
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-40503?: 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.
How severe is CVE-2026-40503?: CVE-2026-40503 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-40503 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-40503?: CVE-2026-40503 affects Hkuds Openharness. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-40503?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-40503 have an EU (EUVD) identifier?: Yes. CVE-2026-40503 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-23143.
When was CVE-2026-40503 published?: CVE-2026-40503 was published on 2026-04-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:hkuds:openharness:*:*:*:*:*:*:*:*

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