CVE-2023-40299Public exploit

Code execution via dylib injection

Published Oct 4, 2023 · Updated Sep 20, 2024

Insomnia 2023.4.0 on macOS allows attackers to execute code and access restricted files via DYLD_INSERT_LIBRARIES. The application was distributed with entitlements that permit DYLD environment variables and disable library validation, allowing an attacker-controlled dylib to load inside Insomnia and inherit its TCC permissions. Local attackers need a user to launch Insomnia or approve a TCC prompt; the demonstrated impact includes arbitrary code execution and restricted-file access.

CVSS severity7.8
High
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insomnia 2023.4.0 on macOS allows attackers to execute code and access restricted files via DYLD_INSERT_LIBRARIES. The application was distributed with entitlements that permit DYLD environment variables and disable library validation, allowing an attacker-controlled dylib to load inside Insomnia and inherit its TCC permissions. Local attackers need a user to launch Insomnia or approve a TCC prompt; the demonstrated impact includes arbitrary code execution and restricted-file access.

The record

CVE
CVE-2023-40299
Published
Oct 4, 2023
Updated
Sep 20, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-114, T1574.006
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 4, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 20, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.8NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-114Process Control
T1574.006Dynamic Linker Hijacking

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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