CVE-2022-43357

Exp

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.

Published: 2023-08-22 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2022-43357 is rated Exploit Available (59.8/100): CVSS High severity, with low exploitation likelihood (EPSS 0.21%). 2 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2022-43357

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2022-43357

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-11-21 0.51% 0.21% -0.30%
2 2025-11-18 0.21% 0.51% +0.30%
3 2025-09-18 — 0.21% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2022-43357

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]

Weakness enumeration for CVE-2022-43357

OS Trackers for CVE-2022-43357

vendor priority summary link
alpine high CVE-2022-43357: 2 source package rows (libsass, sassc); 16 state rows across 7 repos (3.18-community, 3.19-community, 3.20-community, 3.21-community, 3.22-community, 3.23-community, edge-community); fixed 6, open 10. https://security.alpinelinux.org/vuln/CVE-2022-43357
debian not yet assigned CVE-2022-43357 not yet assigned priority: Debian including 1 source packages (libsass), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 3, open 2. https://security-tracker.debian.org/tracker/CVE-2022-43357
suse medium — https://www.suse.com/security/cve/CVE-2022-43357/
ubuntu medium CVE-2022-43357 medium priority: Ubuntu including 1 source packages (libsass), 12 status rows across 12 suites (bionic, focal, jammy, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): needs-triage 4, not-affected 4, ignored 3, released 1. https://ubuntu.com/security/CVE-2022-43357

Affected software / configurations for CVE-2022-43357

Vendor Product Version Raw CPE
sass-lang libsass 3.6.5-8-g210218 cpe:2.3:a:sass-lang:libsass:3.6.5-8-g210218:*:*:*:*:*:*:*
sass-lang sassc 3.6.2 cpe:2.3:a:sass-lang:sassc:3.6.2:*:*:*:*:*:*:*

References for CVE-2022-43357

URL Tags
https://drive.google.com/file/d/1aC5q3czen0atI91fuBIoCBFkS30_OSWX/ Exploit Permissions Required Third Party Advisory
https://github.com/sass/libsass Product
https://github.com/sass/libsass/issues/3177 Exploit Issue Tracking Vendor Advisory
cvelogic Threat Intelligence