libsass: DoS in Sass::Complex_Selector::perform in ast.hpp and Sass::Inspect::operator in inspect.cpp
Published Apr 23, 2019
6.5
MEDIUMCVSS 3.1
EPSS 2.11%
Description
LibSass 3.5.4 allows attackers to cause a denial-of-service (uncontrolled recursion in Sass::Complex_Selector::perform in ast.hpp and Sass::Inspect::operator in inspect.cpp).
Affected products
Remediation
Red Hat statement
This issue did not affect the versions of libsass as shipped with Red Hat Enterprise Linux 8 as the flaw was introduced in a newer version of the library.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AV:N/AC:M/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v5
Table of values (14 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.11% (0.02107) | 81.08th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.11% (0.02107) | 79.28th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.28% (0.00280) | 68.70th | v3 (v2023.03.01) |
| Apr 16, 2024 | 0.28% (0.00280) | 68.01th | v3 (v2023.03.01) |
| Jul 8, 2023 | 0.24% (0.00240) | 60.92th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.28% (0.00280) | 63.44th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.02% (0.01018) | 40.69th | v2 (v2022.01.01) |
| Sep 10, 2022 | 1.02% (0.01018) | 38.88th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.02% (0.01018) | 36.86th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.02% (0.01018) | 19.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.04% (0.01040) | 28.32th | v1 |
| Jan 6, 2022 | 1.04% (0.01040) | 27.69th | v1 |
| Sep 1, 2021 | 1.04% (0.01040) | 64.49th | v1 |
| Apr 14, 2021 | 1.04% (0.01040) | 0.00th | v1 |
References (8)
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00047.html vendor-advisoryx_refsource_SUSEBroken Link
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00051.html vendor-advisoryx_refsource_SUSEBroken Link
- http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00027.html vendor-advisoryx_refsource_SUSEBroken Link
- https://access.redhat.com/security/cve/CVE-2018-20822 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1706031 Issue Tracking
- https://github.com/sass/libsass/issues/2671 x_refsource_MISCExploitThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2018-20822
- https://www.cve.org/CVERecord?id=CVE-2018-20822
| Link | Providers | Tags |
|---|---|---|
| http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00047.html | vendor-advisoryx_refsource_SUSEBroken Link | |
| http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00051.html | vendor-advisoryx_refsource_SUSEBroken Link | |
| http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00027.html | vendor-advisoryx_refsource_SUSEBroken Link | |
| https://access.redhat.com/security/cve/CVE-2018-20822 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1706031 | Issue Tracking | |
| https://github.com/sass/libsass/issues/2671 | x_refsource_MISCExploitThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2018-20822 | ||
| https://www.cve.org/CVERecord?id=CVE-2018-20822 |
Change history (0)
No recorded changes yet.