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Fencer Vulns
high 7.5

CVE-2022-43357 json

Stack overflow vulnerability in `ast_selectors.cpp` in function...

published 2023-08-22 3 y ago modified 2026-09-08 2 mo ago also BIT-sass-2022-43357 , EUVD-2022-46396 , GHSA-j7vr-2gc9-mmv7 , JLSEC-2026-664

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.5%
EPSS 1.5% chance of exploitation in 30 days, percentile 74%
public exploits
0
none known

Summary

Stack overflow vulnerability in ast_selectors.cpp in function Sass::CompoundSelector::has_real_parent_ref in libsass:3.6.5-8-g210218, which can be exploited by attackers to causea denial of service (DoS). Also affects the command line driver for libsass, sassc 3.6.2.

Patch / fix

  • bitnami sass 3.6.5
  • libsass Debian 14, Debian 13 3.6.5+20231221-2

debian advisories DEBIAN-CVE-2022-43357

  • libsass SLE Module for Package Hub 15 SP5, SLE Module for Package Hub 15 SP4, openSUSE Leap 15.5 +1 more 3.6.5-150200.4.10.1

suse advisories SUSE-SU-2023:4895-1

  • libsass openSUSE Tumbleweed 3.6.5-2.1

opensuse advisories openSUSE-SU-2024:13516-1

  • libsass Alpine 3.24, Alpine 3.23, Alpine 3.22 +3 more 3.6.6-r0

alpine advisories ALPINE-CVE-2022-43357

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • libsass Azure Linux 3.0 3.6.6-1

azure linux advisories AZL-44079

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-43357 updated cvss 5.3

libsass: stack overflow in Sass::CompoundSelector::has_real_parent_ref() in ast_selectors.cpp

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
yes
Technical impact
partial
Assessed
2 y ago

Exploit prediction

1.52% chance of exploitation in the next 30 days, higher than 74% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • drive.google.com https://drive.google.com/file/d/1aC5q3czen0atI91fuBIoCBFkS30_OSWX/ referenced PoC, tagged "exploit" by a source, unverified
  • github.com https://github.com/sass/libsass/issues/3177 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
bitnami sass
>=3.6.5-8-g210218, <3.6.5
3.6.5
julia SassC_jll
all versions
 no fix listed

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.