CVE-2026-100503 Ghidra through 12.1.4 Heap Use-After-Free in Decompiler

Medium 4.8 Published 26 Sep 2026 Updated 22 Oct 2026

Attackers can crash the Ghidra decompiler by providing a malicious binary, disrupting reverse engineering workflows and automated analysis pipelines.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2026-100503?

CVE-2026-100503 is a medium-severity use after free vulnerability in NationalSecurityAgency ghidra, published on 26 Sep 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

Ghidra versions through 12.1.4 contain a heap use-after-free vulnerability in the decompiler's Funcdata::opInsertAfter function caused by stale INDIRECT effect-op references. Attackers can craft a malicious binary with a specific x86-64 sequence that triggers the vulnerability during decompilation, causing the decompile helper process to crash and denying service to analysts and automated analysis pipelines.

Weakness: CWE-416

Which versions are affected by CVE-2026-100503?

It affects 1 product.

Products include Nsa Ghidra.

How do I fix CVE-2026-100503?

No fix has been published for CVE-2026-100503 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2026-100503 being exploited?

There is no known exploitation of CVE-2026-100503 in the wild and no public exploit code.

Sources

Also known as GHSA-7rr6-c8rx-m78p.