# CVE-2026-41144: F´ (F Prime) has Integer Overflow in FileUplink

> An integer overflow in F Prime allows attackers to bypass bounds checks and write arbitrary data to any file, leading to remote code execution on embedded targets.

- **Severity:** Not scored
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 21 Apr 2026
- **Updated:** 22 Apr 2026
- **Also known as:** GHSA-qmvv-rxh4-ccqh

## What is CVE-2026-41144?

CVE-2026-41144 is a vulnerability in nasa fprime, published on 21 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

F´ (F Prime) is a framework that enables development and deployment of spaceflight and other embedded software applications. Prior to version 4.2.0, the bounds check byteOffset + dataSize > fileSize uses U32 addition that wraps around on overflow. An attacker-crafted DataPacket with byteOffset=0xFFFFFF9C and dataSize=100 overflows to 0, bypassing the check entirely. The subsequent file write proceeds at the original ~4GB offset. Additionally, Svc/FileUplink/File.cpp:20-31 performs no sanitization on the destination file path. Combined, these allow writing arbitrary data to any file at any offset. The impact is arbitrary file write leading to remote code execution on embedded targets. Note that this is a logic bug. ASAN does not detect it because all memory accesses are within valid buffers — the corruption occurs in file I/O. Version 4.2.0 contains a patch. No known workarounds are available.

Weakness: CWE-787 (Out-of-bounds Write), CWE-190 (Integer Overflow or Wraparound)

## Which versions are affected by CVE-2026-41144?

It affects 1 product.


Products: Nasa Fprime.

## How do I fix CVE-2026-41144?

No fix has been published for CVE-2026-41144 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-41144 being exploited?

There is no known exploitation of CVE-2026-41144 in the wild and no public exploit code.

## Other vulnerabilities in nasa fprime

- [CVE-2024-55028](https://insights.sbomify.com/CVE-2024-55028/): Code injection in n/a (critical 9.8)
- [CVE-2024-55030](https://insights.sbomify.com/CVE-2024-55030/): Command injection in n/a (critical 9.8)
- [CVE-2024-55029](https://insights.sbomify.com/CVE-2024-55029/): Cross-site scripting in n/a (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-41144 and fix it if it is affected.

What it is: CVE-2026-41144 is a vulnerability in nasa fprime, published on 21 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-41144 in the wild and no public exploit code.

Affected product: nasa fprime. 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-2026-41144/ (Markdown: https://insights.sbomify.com/CVE-2026-41144/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-41144
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-41144
- OSV: https://osv.dev/vulnerability/CVE-2026-41144

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-41144/
Summaries are generated and may contain mistakes; the official description above is the record.