How severe is CVE-2018-19826?

CVE-2018-19826 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-2018-19826 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-19826?

CVE-2018-19826 affects Sass-lang Libsass. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-19826?

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

When was CVE-2018-19826 published?

CVE-2018-19826 was published on 2018-12-03 and last updated on 2026-06-17.

CVE-2018-19826

CVE-2018-19826 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-835.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (64th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-835
Affected product: Sass-lang Libsass
Published: 2018-12-03
Last modified: 2026-06-17

Description

In inspect.cpp in LibSass 3.5.5, a high memory footprint caused by an endless loop (containing a Sass::Inspect::operator()(Sass::String_Quoted*) stack frame) may cause a Denial of Service via crafted sass input files with stray '&' or '/' characters. NOTE: Upstream comments indicate this issue is closed as "won't fix" and "works as intended" by design

Frequently asked questions

What is CVE-2018-19826?: In inspect.cpp in LibSass 3.5.5, a high memory footprint caused by an endless loop (containing a Sass::Inspect::operator()(Sass::String_Quoted*) stack frame) may cause a Denial of Service via crafted sass input files with stray '&' or '/' characters. NOTE: Upstream comments indicate this issue is closed as "won't fix" and "works as intended" by design
How severe is CVE-2018-19826?: CVE-2018-19826 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-2018-19826 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-19826?: CVE-2018-19826 affects Sass-lang Libsass. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-19826?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-19826 published?: CVE-2018-19826 was published on 2018-12-03 and last updated on 2026-06-17.

References

https://github.com/sass/libsass/issues/2781

Affected products (1)

cpe:2.3:a:sass-lang:libsass:3.5.5:*:*:*:*:*:*:*

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