# CVE-2018-11499: Use after free in n/a

> A use-after-free in LibSass allows attackers to cause a denial of service via application crash.

- **Severity:** Critical 9.8 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 26 May 2018
- **Updated:** 5 Aug 2024
- **Also known as:** DEBIAN-CVE-2018-11499, GHSA-c87p-mhv6-fff6, UBUNTU-CVE-2018-11499

## What is CVE-2018-11499?

CVE-2018-11499 is a critical use after free vulnerability in n/a, published on 26 May 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A use-after-free vulnerability exists in handle_error() in sass_context.cpp in LibSass 3.4.x and 3.5.x through 3.5.4 that could be leveraged to cause a denial of service (application crash) or possibly unspecified other impact.

Weakness: CWE-416 (Use After Free)

## Which versions are affected by CVE-2018-11499?

It affects 1 product.


Products: Sass-Lang Libsass.

## How do I fix CVE-2018-11499?

Upgrade to a fixed version.

## Is CVE-2018-11499 being exploited?

There is no known exploitation of CVE-2018-11499 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2022-26592](https://insights.sbomify.com/CVE-2022-26592/): Memory corruption in n/a (high 8.8)
- [CVE-2018-19827](https://insights.sbomify.com/CVE-2018-19827/): Use after free in n/a (high 8.8)
- [CVE-2018-11694](https://insights.sbomify.com/CVE-2018-11694/): Null dereference in n/a (high 8.8)
- [CVE-2018-11695](https://insights.sbomify.com/CVE-2018-11695/): Null dereference in n/a (high 8.8)
- [CVE-2018-11696](https://insights.sbomify.com/CVE-2018-11696/): Null dereference in n/a (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-11499 and fix it if it is affected.

What it is: CVE-2018-11499 is a critical use after free vulnerability in n/a, published on 26 May 2018. 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-2018-11499 in the wild and no public exploit code.

Affected product: n/a. 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-2018-11499/ (Markdown: https://insights.sbomify.com/CVE-2018-11499/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-11499
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-11499
- OSV: https://osv.dev/vulnerability/CVE-2018-11499

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-11499/
Summaries are generated and may contain mistakes; the official description above is the record.