How severe is CVE-2023-40299?

CVE-2023-40299 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-40299 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-40299?

CVE-2023-40299 affects Konghq Insomnia. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-40299?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2023-40299 published?

CVE-2023-40299 was published on 2023-10-04 and last updated on 2026-06-17.

CVE-2023-40299

CVE-2023-40299 is a high-severity vulnerability in Konghq Insomnia with a CVSS 3.x base score of 7.8. 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-114.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 0% (27th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-114
Affected product: Konghq Insomnia
Published: 2023-10-04
Last modified: 2026-06-17

Description

Kong Insomnia 2023.4.0 on macOS allows attackers to execute code and access restricted files, or make requests for TCC permissions, by using the DYLD_INSERT_LIBRARIES environment variable.

Frequently asked questions

What is CVE-2023-40299?: Kong Insomnia 2023.4.0 on macOS allows attackers to execute code and access restricted files, or make requests for TCC permissions, by using the DYLD_INSERT_LIBRARIES environment variable.
How severe is CVE-2023-40299?: CVE-2023-40299 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-40299 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (27th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-40299?: CVE-2023-40299 affects Konghq Insomnia. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-40299?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-40299 published?: CVE-2023-40299 was published on 2023-10-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:konghq:insomnia:2023.4.0:*:*:*:*:*:*:*

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