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CVE-2018-19826

22
FAUCET Score

CVE-2018-19826 describes a Denial of Service vulnerability in LibSass 3.5.5, specifically affecting sass-lang, where crafted Sass input files containing stray '&' or '/' characters can lead to a high memory footprint and an endless loop. This vulnerability has a CVSS score of 6.5 (Medium), indicating it can be exploited remotely with low complexity, requiring user interaction, and resulting in high availability impact. Despite its potential, there is no known active exploitation, publicly available exploit code, or significant community discussion, and the upstream developers have marked it as "won't fix" due to it being considered "works as intended" by design.

Impacted Technologies

VendorProductVersion(s)CPE
3.5.5CPE matchmatch criteria
cpe:2.3:a:sass-lang:libsass:3.5.5:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.5MEDIUM

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.19%
Probability of exploitation in next 30 days
EPSS Percentile
64.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0119 is in the 77th percentile among its peer group of 26,234 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: libsass

Vendor Advisories (1)

redhatCVE-2018-19826Low

libsass: Infinite loop in Sass::Inspect::operator() function resulting in a denial of service

Dec 3, 2018

References

github.com / sass/libsass/issues/2781
Third Party Advisory