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Vulnerability details: VCID-u8s8-4qjn-z3d6
Vulnerability ID VCID-u8s8-4qjn-z3d6
Aliases CVE-2026-4458
Summary chromium-browser: Use after free in Extensions
Status Published
Exploitability 0.5
Weighted Severity 8.6
Risk 4.3
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-825 Expired Pointer Dereference
CWE-416 Use After Free
System Score Found at
cvssv3 9.6 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-4458.json
epss 0.00029 https://api.first.org/data/v1/epss?cve=CVE-2026-4458
epss 0.00029 https://api.first.org/data/v1/epss?cve=CVE-2026-4458
epss 0.00029 https://api.first.org/data/v1/epss?cve=CVE-2026-4458
epss 0.00029 https://api.first.org/data/v1/epss?cve=CVE-2026-4458
epss 0.00029 https://api.first.org/data/v1/epss?cve=CVE-2026-4458
epss 0.00029 https://api.first.org/data/v1/epss?cve=CVE-2026-4458
epss 0.00029 https://api.first.org/data/v1/epss?cve=CVE-2026-4458
epss 0.00029 https://api.first.org/data/v1/epss?cve=CVE-2026-4458
cvssv3.1 8.8 https://chromereleases.googleblog.com/2026/03/stable-channel-update-for-desktop_18.html
ssvc Track https://chromereleases.googleblog.com/2026/03/stable-channel-update-for-desktop_18.html
cvssv3.1 8.8 https://issues.chromium.org/issues/489619753
ssvc Track https://issues.chromium.org/issues/489619753
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-4458.json
https://api.first.org/data/v1/epss?cve=CVE-2026-4458
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-4458
2449395 https://bugzilla.redhat.com/show_bug.cgi?id=2449395
489619753 https://issues.chromium.org/issues/489619753
stable-channel-update-for-desktop_18.html https://chromereleases.googleblog.com/2026/03/stable-channel-update-for-desktop_18.html
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-4458.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:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://chromereleases.googleblog.com/2026/03/stable-channel-update-for-desktop_18.html
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: SSVCv2/E:N/A:N/T:T/P:M/B:A/M:M/D:T/2026-03-20T14:33:28Z/ Found at https://chromereleases.googleblog.com/2026/03/stable-channel-update-for-desktop_18.html
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://issues.chromium.org/issues/489619753
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: SSVCv2/E:N/A:N/T:T/P:M/B:A/M:M/D:T/2026-03-20T14:33:28Z/ Found at https://issues.chromium.org/issues/489619753
Exploit Prediction Scoring System (EPSS)
Percentile 0.08294
EPSS Score 0.00029
Published At April 2, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T13:30:28.537439+00:00 RedHat Importer Import https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-4458.json 38.0.0