MEDIUM
libsass: heap-based buffer overflow in Sass:weaveParents in ast_sel_weave.cpp
Published Nov 6, 2019
6.5
MEDIUMCVSS 3.1
EPSS 1.05%
Description
LibSass before 3.6.3 allows a heap-based buffer over-read in Sass::weaveParents in ast_sel_weave.cpp.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
6.5 MEDIUM NVD
CVSS:3.1/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
No CVSS v3.0 score for this CVE.
4.3 MEDIUM NVD
AV:N/AC:M/Au:N/C:N/I:N/A:P
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
1.05% 0.01053
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
EPSS probability 0.01053
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 1.05% (0.01053) | 63.16th | v5 (v2026.06.15) |
| Sep 20, 2026 | 1.05% (0.01053) | 62.86th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.10% (0.00096) | 40.85th | v3 (v2023.03.01) |
| Jul 10, 2024 | 0.10% (0.00096) | 40.81th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.10% (0.00096) | 38.79th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.89% (0.00885) | 24.24th | v2 (v2022.01.01) |
| Mar 31, 2022 | 2.56% (0.02561) | 62.63th | v2 (v2022.01.01) |
| Jan 6, 2022 | 1.84% (0.01840) | 47.32th | v1 |
| Jan 5, 2022 | 0.42% (0.00416) | 26.65th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.42% (0.00416) | 0.00th | v1 |
Weaknesses (1)
References (5)
- https://access.redhat.com/security/cve/CVE-2019-18798 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1852074 Issue Tracking
- https://github.com/sass/libsass/issues/2999 x_refsource_MISCExploitThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2019-18798
- https://www.cve.org/CVERecord?id=CVE-2019-18798
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2019-18798 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1852074 | Issue Tracking | |
| https://github.com/sass/libsass/issues/2999 | x_refsource_MISCExploitThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2019-18798 | ||
| https://www.cve.org/CVERecord?id=CVE-2019-18798 |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Nov 6, 2019
Updated Aug 5, 2024
Reserved Nov 6, 2019
Link CVE-2019-18798
CISA Vulnrichment
Updated n/a