How severe is CVE-2018-20822?

CVE-2018-20822 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2018-20822 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-20822?

CVE-2018-20822 affects Sass-lang Libsass. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-20822?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2018-20822 published?

CVE-2018-20822 was published on 2019-04-23 and last updated on 2026-06-17.

CVE-2018-20822

CVE-2018-20822 is a medium-severity vulnerability in Sass-lang Libsass with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-674.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-674
Affected product: Sass-lang Libsass
Published: 2019-04-23
Last modified: 2026-06-17

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).

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 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2018-20822 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-20822?: CVE-2018-20822 affects Sass-lang Libsass. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-20822?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-20822 published?: CVE-2018-20822 was published on 2019-04-23 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:sass-lang:libsass:3.5.4:*:*:*:*:*:*:*

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