CVE-2022-26755

Sandbox escape via insufficient Tcl environment sanitization

Published May 26, 2022 · Updated Aug 3, 2024

A sandbox escape in Tcl in Apple macOS Catalina, Big Sur before 11.6.6, and Monterey before 12.4 allows local users to escape an app sandbox. The Tcl component insufficiently sanitizes the process environment before a sandboxed malicious application invokes it. Exploitation requires a malicious local application and user interaction; success permits actions outside the application's assigned sandbox.

CVSS severity6.3
Medium
EPSS probability0.79%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A sandbox escape in Tcl in Apple macOS Catalina, Big Sur before 11.6.6, and Monterey before 12.4 allows local users to escape an app sandbox. The Tcl component insufficiently sanitizes the process environment before a sandboxed malicious application invokes it. Exploitation requires a malicious local application and user interaction; success permits actions outside the application's assigned sandbox.

The record

CVE
CVE-2022-26755
Published
May 26, 2022
Updated
Aug 3, 2024
Vendor
Apple
Product
Security Update Catalina
Classifications
Unavailable
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 26, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <2022

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Apple · Security Update Catalinaversion=unspecified <2022
Apple · macOSversion=unspecified <11.6; version=unspecified <12.4

Published CVSS scores

4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
6.3NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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 exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

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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