# CVE-2026-1144: quickjs-ng quickjs Atomics Ops quickjs.c use after free

> Remote attackers can exploit a use-after-free flaw in the quickjs-ng JavaScript engine to potentially execute arbitrary code or cause denial of service.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 19 Jan 2026
- **Updated:** 25 Feb 2026
- **Also known as:** ALPINE-CVE-2026-1144, DEBIAN-CVE-2026-1144, GHSA-2gmr-vqp5-r9qg, UBUNTU-CVE-2026-1144

## What is CVE-2026-1144?

CVE-2026-1144 is a medium-severity use after free vulnerability in quickjs-ng quickjs, published on 19 Jan 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

A vulnerability was detected in quickjs-ng quickjs up to 0.11.0. Affected is an unknown function of the file quickjs.c of the component Atomics Ops Handler. The manipulation results in use after free. The attack can be executed remotely. The exploit is now public and may be used. The patch is identified as ea3e9d77454e8fc9cb3ef3c504e9c16af5a80141. Applying a patch is advised to resolve this issue.

Weakness: CWE-416 (Use After Free), CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2026-1144?

It affects 1 product.


Products: Quickjs-Ng Quickjs.

## How do I fix CVE-2026-1144?

Apply the vendor's patch.

## Is CVE-2026-1144 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-1144 exists.

## Other vulnerabilities in quickjs-ng quickjs

- [CVE-2026-0821](https://insights.sbomify.com/CVE-2026-0821/): quickjs-ng quickjs quickjs.c js_typed_array_constructor heap-based overflow (medium 6.9)
- [CVE-2025-46688](https://insights.sbomify.com/CVE-2025-46688/): Memory corruption in QuickJS (medium 5.6)
- [CVE-2026-1145](https://insights.sbomify.com/CVE-2026-1145/): quickjs-ng quickjs quickjs.c js_typed_array_constructor_ta heap-based overflow (medium 5.3)
- [CVE-2026-0822](https://insights.sbomify.com/CVE-2026-0822/): quickjs-ng quickjs quickjs.c js_typed_array_sort heap-based overflow (medium 5.3)
- [CVE-2024-13903](https://insights.sbomify.com/CVE-2024-13903/): quickjs-ng QuickJS qjs quickjs.c JS_GetRuntime stack-based overflow (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-1144 and fix it if it is affected.

What it is: CVE-2026-1144 is a medium-severity use after free vulnerability in quickjs-ng quickjs, published on 19 Jan 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-1144 exists.

Affected product: quickjs-ng quickjs. 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-2026-1144/ (Markdown: https://insights.sbomify.com/CVE-2026-1144/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-1144
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-1144
- OSV: https://osv.dev/vulnerability/CVE-2026-1144

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-1144/
Summaries are generated and may contain mistakes; the official description above is the record.