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

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

- **Severity:** Medium 4.8 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N`)
- **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 available:** No
- **Published:** 26 Sep 2026
- **Updated:** 22 Oct 2026
- **Also known as:** GHSA-7rr6-c8rx-m78p

## 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 (Use After Free)

## Which versions are affected by CVE-2026-100503?

It affects 1 product.


Products: 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.

## Is CVE-2026-100503 being exploited?

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

## Other vulnerabilities in NationalSecurityAgency ghidra

- [CVE-2023-22671](https://insights.sbomify.com/CVE-2023-22671/): Command injection in n/a (critical 9.8)
- [CVE-2019-16941](https://insights.sbomify.com/CVE-2019-16941/): XML external entity in n/a (critical 9.8)
- [CVE-2019-13625](https://insights.sbomify.com/CVE-2019-13625/): XML external entity in n/a (critical 9.1)
- [CVE-2026-4946](https://insights.sbomify.com/CVE-2026-4946/): NSA Ghidra Auto-Analysis Annotation Command Execution (high 8.8)
- [CVE-2026-49498](https://insights.sbomify.com/CVE-2026-49498/): Ghidra 11.0 < 12.1 - SQL Injection in PostgreSQL Password Change via Unescaped Username (high 8.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-100503 and fix it if it is affected.

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

Affected product: NationalSecurityAgency ghidra. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-100503/ (Markdown: https://insights.sbomify.com/CVE-2026-100503/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-100503
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-100503
- OSV: https://osv.dev/vulnerability/CVE-2026-100503

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-100503/
Summaries are generated and may contain mistakes; the official description above is the record.