TI-2018-14052 Aliases CVE-2018-19837 GHSA-c774-r78g-7qj4

In LibSass prior to 3.5.5, Sass::Eval::operator()(Sass::Binary_Expression*) inside…

LOW 32CWE-400Published 2018-12-04 · Updated 2024-08-05

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-400.

Summary

In LibSass prior to 3.5.5, Sass::Eval::operator()(Sass::Binary_Expression*) inside eval.cpp allows attackers to cause a denial-of-service resulting from stack consumption via a crafted sass file, because of certain incorrect parsing of '%' as a modulo operator in parser.cpp.

Why it matters now

EPSS 0.01797 78th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:sass-lang:libsass::::::::	before 3.5.5	Vulnerable	Sass-lang

cpe:2.3:a:sass-lang:libsass:*:*:*:*:*:*:*:* Versions before 3.5.5 Vulnerable ·Sass-lang

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product

Red Hat

Timeline

2026-10-02 Threatist record created from CVE-2018-19837
2026-10-03 Alias added: GHSA-c774-r78g-7qj4

References

Exploit 1

https://github.com/sass/libsass/commit/210fdff7a65370c2ae24e022a2b35da8c423cc5f

Patch 1

https://github.com/sass/libsass/issues/2659

Advisory 3

TI-2022-21169 Stack overflow vulnerability in ast_selectors.cpp: in function… CVSS 3.1HIGH 7.5
TI-2022-21168 Stack overflow vulnerability in ast_selectors.cpp in function… CVSS 3.1HIGH 7.5
TI-2018-08219 A use-after-free vulnerability exists in handle_error() in sass_context.cpp in LibSass… CVSS 3.0CRITICAL 9.8
TI-2022-09890 Stack Overflow vulnerability in libsass 3.6.5 via the CompoundSelector::has_real_parent_ref function. CVSS 3.1HIGH 8.8
TI-2018-14042 In LibSass 3.5.5, a use-after-free vulnerability exists in the SharedPtr class in… CVSS 3.0HIGH 8.8
TI-2018-08363 An issue was discovered in LibSass through 3.5.4. CVSS 3.0HIGH 8.8

See all 26 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences