CVE-2019-18797 Denial of service in n/a
An attacker can cause a denial of service in applications using LibSass by triggering uncontrolled recursion during Sass evaluation.
- 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-2019-18797?
CVE-2019-18797 is a medium-severity denial of service 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 3.6.1 has uncontrolled recursion in Sass::Eval::operator()(Sass::Binary_Expression*) in eval.cpp.
Weakness: CWE-674
Which versions are affected by CVE-2019-18797?
It affects 1 product.
Products include Sass-Lang Libsass.
How do I fix CVE-2019-18797?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2019-18797 being exploited?
There is no known exploitation of CVE-2019-18797 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as DEBIAN-CVE-2019-18797, GHSA-6cpv-g87x-7jfq, JLSEC-2026-505.