What is CVE-2023-40299?

CVE-2023-40299 is a high-severity vulnerability in Apple macOS, classified under Process Control. CVSS score: 7.8/10. Published 2023-10-04.

How severe is CVE-2023-40299?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Apple macOS

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.

Published 2023-10-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (36.2th percentile), scored 2026-10-20.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 36.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.001

Affected products

Apple macOS
Konghq Insomnia — versions 2023.4.0

Weakness classification (CWE)

CWE-114 — Process Control

References

insomnia.rest/changelog (Release Notes)
github.com/Kong/insomnia/releases (Release Notes)
www.angelystor.com/posts/cve-2023-40299/ (Exploit, Third Party Advisory)
github.com/Kong/insomnia/pull/6217/commits (Patch)

Frequently asked questions

What is CVE-2023-40299?: CVE-2023-40299 is a high-severity vulnerability in Apple macOS, classified under Process Control. CVSS score: 7.8/10. Published 2023-10-04.
How severe is CVE-2023-40299?: High severity. CVSS v3 base score is 7.8 out of 10.