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Vulnerability details: VCID-x1zs-swgf-efd6
Vulnerability ID VCID-x1zs-swgf-efd6
Aliases CVE-2018-4121
Summary Multiple vulnerabilities have been found in WebKitGTK+, the worst of which may lead to arbitrary code execution.
Status Published
Exploitability 2.0
Weighted Severity 4.5
Risk 9.0
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
System Score Found at
cvssv3 5.0 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-4121.json
epss 0.3861 https://api.first.org/data/v1/epss?cve=CVE-2018-4121
epss 0.3861 https://api.first.org/data/v1/epss?cve=CVE-2018-4121
epss 0.3861 https://api.first.org/data/v1/epss?cve=CVE-2018-4121
epss 0.3861 https://api.first.org/data/v1/epss?cve=CVE-2018-4121
epss 0.3861 https://api.first.org/data/v1/epss?cve=CVE-2018-4121
epss 0.3861 https://api.first.org/data/v1/epss?cve=CVE-2018-4121
epss 0.3861 https://api.first.org/data/v1/epss?cve=CVE-2018-4121
epss 0.3861 https://api.first.org/data/v1/epss?cve=CVE-2018-4121
epss 0.3861 https://api.first.org/data/v1/epss?cve=CVE-2018-4121
cvssv3 8.8 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-4121.json
https://api.first.org/data/v1/epss?cve=CVE-2018-4121
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4121
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
1577387 https://bugzilla.redhat.com/show_bug.cgi?id=1577387
CVE-2018-4121 Exploit https://bugs.chromium.org/p/project-zero/issues/detail?id=1522
CVE-2018-4121 Exploit https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/multiple/dos/44427.txt
GLSA-201808-04 https://security.gentoo.org/glsa/201808-04
RHSA-2018:3140 https://access.redhat.com/errata/RHSA-2018:3140
Data source Exploit-DB
Date added April 9, 2018
Description WebKit - WebAssembly Parsing Does not Correctly Check Section Order
Ransomware campaign use Known
Source publication date April 9, 2018
Exploit type dos
Platform multiple
Source update date April 9, 2018
Source URL https://bugs.chromium.org/p/project-zero/issues/detail?id=1522
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-4121.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.97218
EPSS Score 0.3861
Published At April 1, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T13:12:30.689238+00:00 Gentoo Importer Import https://security.gentoo.org/glsa/201808-04 38.0.0