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No exploitation reportedFix available

CVE-2026-121166

No exploitation reported by the sources we read.

  • Published2026-11-03
  • Fixed in157.0.8103.38
  • 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 PDFium in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted PDF file. (Chromium security severity: High)

Timeline

dates in UTC
  1. 2026-11-0320:42CVE publishedCNA

Observed activity

isMalicious corpus · updated 2026-11-04 15:37 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-2026-121166?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-121166?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Google chrome
BranchAffectedFixed in
157.0< 157.0.8103.38157.0.8103.38

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

Products declared by the CNA1 product

As Chrome, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • Google Chrome
    Affected
    • ≥ 157.0.8103.38, < 157.0.8103.38fixed in 157.0.8103.38custom

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-11-03

Fix

  1. Update Google chrome to 157.0.8103.38

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

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
2026-11-03
Last Modified
2026-11-04
NVD status
Analyzed
GitHub Advisory
GHSA-2c4x-hw6w-h72g

Frequently asked questions

What is CVE-2026-121166?

Type confusion in PDFium in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted PDF file. (Chromium security severity: High)

Is CVE-2026-121166 actively exploited?

Active exploitation of CVE-2026-121166 has not been confirmed.

What is the CVSS score for CVE-2026-121166?

CVE-2026-121166 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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