CVE-2019-18799 Null dereference in n/a
Medium 6.5
Published
Updated
Check this codebase for CVE-2019-18799 and fix it if it is affected.
What it is: CVE-2019-18799 is a medium-severity vulnerability in n/a, published on 6 Nov 2019. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2019-18799 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-2019-18799/ (Markdown: https://insights.sbomify.com/CVE-2019-18799/index.md)
A NULL pointer dereference in LibSass allows attackers to cause a denial of service via crafted input.
- 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
What is CVE-2019-18799?
CVE-2019-18799 is a medium-severity vulnerability in n/a, published on 6 Nov 2019. 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
LibSass before 3.6.3 allows a NULL pointer dereference in Sass::Parser::parseCompoundSelector in parser_selectors.cpp.
Weakness: CWE-476
Which versions are affected by CVE-2019-18799?
It affects 1 product.
Products include Sass-Lang Libsass.
How do I fix CVE-2019-18799?
Upgrade to a fixed version.
Is CVE-2019-18799 being exploited?
There is no known exploitation of CVE-2019-18799 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as DEBIAN-CVE-2019-18799, GHSA-j6f2-xv6r-9x28, JLSEC-2026-507.