CVE-2018-20822

Name: CVE-2018-20822
Creator: NVD / NIST
Published: 2019-04-23T14:29:00.54+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 2.11%

Last modified Jun 17, 2026

CVE-2018-20822 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. LibSass 3.5.4 allows attackers to cause a denial-of-service (uncontrolled recursion in Sass::Complex_Selector::perform in ast.hpp and Sass::Inspect::operator in inspect.cpp).. EPSS estimates a 2.11% chance of exploitation in the next 30 days.

Description

LibSass 3.5.4 allows attackers to cause a denial-of-service (uncontrolled recursion in Sass::Complex_Selector::perform in ast.hpp and Sass::Inspect::operator in inspect.cpp).

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

EPSS Probability

2.11%

79.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-674

Affected Software

Vendor	Product	Versions
Sass-Lang	Libsass	3.5.4

References

http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00047.htmlBroken Link
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00051.htmlBroken Link
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00027.htmlBroken Link
https://github.com/sass/libsass/issues/2671Exploit, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00047.htmlBroken Link
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00051.htmlBroken Link
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00027.htmlBroken Link
https://github.com/sass/libsass/issues/2671Exploit, Third Party Advisory

Timeline

Published: Apr 23, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-20822?

LibSass 3.5.4 allows attackers to cause a denial-of-service (uncontrolled recursion in Sass::Complex_Selector::perform in ast.hpp and Sass::Inspect::operator in inspect.cpp).

How severe is CVE-2018-20822?

CVE-2018-20822 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 2.11% probability of exploitation in the next 30 days.

How do I fix CVE-2018-20822?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-20822?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST