Public proof of conceptFix available

CVE-2023-4427

Q: Is CVE-2023-4427 actively exploited?

Active exploitation of CVE-2023-4427 has not been confirmed. Its EPSS score was 48.5% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2023-4427?

CVE-2023-4427 has a CVSS v3 base score of 8.1 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H.

A public proof of concept exists; no exploitation attested.

Published2023-08-23
WeaknessCWE-125

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Out of bounds memory access in V8 in Google Chrome prior to 116.0.5845.110 allowed a remote attacker to perform an out of bounds memory read via a crafted HTML page. (Chromium security severity: High)

Timeline

dates in UTC

2023-08-2300:15CVE publishedNVD
2026-10-2319:23First public proof of conceptPoC-in-GitHub
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-4427?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-4427?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Fedoraproject fedora

Branch	Affected	Fixed in	Source
37.x	= 37	no fix published	NVD
38.x	= 38	no fix published	NVD
39.x	= 39	no fix published	NVD

Google chrome

Branch	Affected	Fixed in	Source
116.0	< 116.0.5845.110	116.0.5845.110	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

chromereleases.googleblog.comRelease Notes · Vendor Advisory

Detection

read 2026-10-23 19:23 UTC

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: 1 repository, unverifiedtianstcht/CVE-2023-4427

Sources

CISA-ADPSSVC decisionnone2024-10-01
OpenCVESSVC decisionnone—
NVDCVSS 3.18.1read 2026-10-23
NVDweakness (CWE)CWE-125read 2026-10-23
FIRST EPSSEPSS score48.5 %read 2026-10-23
PoC-in-GitHubproof of concept1read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
Published: 2023-08-23
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2023-4427?

Is CVE-2023-4427 actively exploited?

Active exploitation of CVE-2023-4427 has not been confirmed. Its EPSS score was 48.5% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-4427?

CVE-2023-4427 has a CVSS v3 base score of 8.1 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H.

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