In inspect.cpp in LibSass 3.5.5, a high memory footprint caused by an endless loop…
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
- Will not fix Red Hat: no fix planned
Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-835.
Summary
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
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
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
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 8 | Affected | No fix planned: Will not fix |
Timeline
- 2026-10-02 Threatist record created from CVE-2018-19826
- 2026-10-03 Alias added: GHSA-vj6g-6xq4-cmrw
References
More Sass-lang Libsass vulnerabilities
- 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
Sources
- CVE-2018-19826 · CVE Program
- CVE-2018-19826 · NVD
- FIRST EPSS
- GHSA-vj6g-6xq4-cmrw · GitHub Advisory Database · CC BY 4.0
- CVE-2018-19826 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences