Public proof of conceptFix available

CVE-2021-38001

Q: Is CVE-2021-38001 actively exploited?

Active exploitation of CVE-2021-38001 has not been confirmed. Its EPSS score was 26.7% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2021-38001?

CVE-2021-38001 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

A public proof of concept exists; no exploitation attested.

Published2021-11-23
WeaknessCWE-843

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

Type confusion in V8 in Google Chrome prior to 95.0.4638.69 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Timeline

dates in UTC

2021-11-2322:15CVE 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-2021-38001?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-38001?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Debian debian linux

Branch	Affected	Fixed in	Source
10.0	= 10.0	no fix published	NVD
11.0	= 11.0	no fix published	NVD

Fedoraproject fedora

Branch	Affected	Fixed in	Source
34.x	= 34	no fix published	NVD

Google chrome

Branch	Affected	Fixed in	Source
95.0	< 95.0.4638.69	95.0.4638.69	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
crbug.comVendor Advisory

Detection

read 2026-10-23 19:23 UTC

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: 2 repositories, unverifiedmaldiohead/TFC-Chrome-v8-bug-CVE-2021-38001-pocPeterpan0927/TFC-Chrome-v8-bug-CVE-2021-38001-poc

Sources

NVDCVSS 3.18.8read 2026-10-23
NVDCVSS 2.06.8read 2026-10-23
NVDweakness (CWE)CWE-843read 2026-10-23
FIRST EPSSEPSS score26.7 %read 2026-10-23
PoC-in-GitHubproof of concept2read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published: 2021-11-23
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2021-38001?

Type confusion in V8 in Google Chrome prior to 95.0.4638.69 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Is CVE-2021-38001 actively exploited?

Active exploitation of CVE-2021-38001 has not been confirmed. Its EPSS score was 26.7% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-38001?

CVE-2021-38001 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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