CVE-2020-6418 — Google Chromium V8 Type Confusion Vulnerability

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

• Documented patch — crbug.com (NIST National Vulnerability Database)

CISA required action CISA

Apply updates per vendor instructions.

US federal deadline: May 3, 2022 — passed 1626 day(s) ago

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

1. Identify exposed assets running the affected vendor/product/version combinations (Debian Debian Linux, Fedoraproject Fedora, Google Chrome…).
2. Treat as emergency remediation: the CVE is in CISA KEV (confirmed exploitation).
3. The attack is network-based and needs no privileges: restrict exposure (ACLs, VPN, WAF) until patched.
4. Apply the fixed version or the patch documented under Remediation.
5. Exploitation requires user interaction: tighten email/web filtering and warn affected users.
6. EPSS ahead of 100% of scored CVEs: prioritize it in the patch queue.
7. Search available logs for exploit probes matching the vulnerability class (memory corruption), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-843 · Type Confusion

Other CVEs with this weakness →

CISA KEV details CISA

CISA lists a CVE once it has evidence of exploitation against real targets.

CISA records ransomware use only for campaigns it has confirmed, so “Unknown” means unrecorded, not ruled out. The deadline binds US federal agencies; for everyone else it is a reference date.

Public exploits, PoCs and detection templates

Public code that demonstrates or tests the flaw raises the odds of mass exploitation — and Nuclei templates help find vulnerable assets in your environment.

Warning: public PoCs are sometimes disguised malware. Use them only for authorized testing in an isolated environment. This portal does not host exploit code — it only points to the sources.

EPSS over time FIRST

Oct 13, 2026 → Oct 14, 2026 · 2 reading(s) · max 78.81%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

• Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
• Correlate service crashes/restarts with inbound traffic; repeated crashes may indicate attempts.
• Hunt retroactively in logs from before Nov 3, 2021 (KEV listing): exploitation may have started earlier.

Timeline

What happened to this CVE, newest first.

• 2026
• Affected products added · google/chrome
  Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
• SSVC assessment updated
  Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
• Record published
  Oct 13, 2026
• Fix documented
  Oct 13, 2026 · NIST National Vulnerability Database
• Affected products added · google/chrome, fedoraproject/fedora, redhat/enterprise linux desktop, redhat/enterprise linux server, redhat/enterprise
  Oct 13, 2026 · NIST National Vulnerability Database
• CVSS changed · 8.8
  Oct 13, 2026 · NIST National Vulnerability Database
• Source status changed · → Analyzed
  Oct 13, 2026 · NIST National Vulnerability Database
• Added to CISA KEV (detected)
  Oct 13, 2026 · CISA Known Exploited Vulnerabilities
• Record created in this database
  Oct 13, 2026 · CISA Known Exploited Vulnerabilities
• 2021
• Added to CISA KEV catalog
  Nov 2, 2021 · CISA
• 2020
• CVE published
  Feb 27, 2020 · Chrome

Source activity

Repeated readings are counted rather than listed.

• 2× References added · Oct 13, 2026 – Oct 13, 2026
• 1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

15 on the record

• chromereleases.googleblog.com/2020/02/stable-channel-update-for-desktop_24.html
  Release Notes, Vendor Advisory, x_refsource_MISC, NIST National Vulnerability Database
• crbug.com/1053604
  Exploit, Issue Tracking, Patch, Vendor Advisory, x_refsource_MISC, NIST National Vulnerability Database
• www.cisa.gov/known-exploited-vulnerabilities-catalog
  US Government Resource, NIST National Vulnerability Database
• access.redhat.com/errata/RHSA-2020:0738
  Third Party Advisory, vendor-advisory, x_refsource_REDHAT, NIST National Vulnerability Database
• nvd.nist.gov/vuln/detail/CVE-2020-6418
  GitHub Security Advisories
• packetstormsecurity.com/files/156632/Google-Chrome-80-JSCreate-Side-Effect-Type-Confusion.htm
  Exploit, Third Party Advisory, VDB Entry, x_refsource_MISC, NIST National Vulnerability Database
• www.debian.org/security/2020/dsa-4638
  Mailing List, Third Party Advisory, vendor-advisory, x_refsource_DEBIAN, NIST National Vulnerability Database
• lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6IOHSO
  GitHub Security Advisories
• lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/X3B5RW
  GitHub Security Advisories
• lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X3B5
  Release Notes, vendor-advisory, x_refsource_FEDORA, NIST National Vulnerability Database
• security.gentoo.org/glsa/202003-08
  Third Party Advisory, vendor-advisory, x_refsource_GENTOO, NIST National Vulnerability Database
• lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6IOH
  GitHub Security Advisories
• github.com/advisories/GHSA-495j-4jmx-mgrx
  GitHub Security Advisories
• lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X3B5
  GitHub Security Advisories
• lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6IOH
  Release Notes, vendor-advisory, x_refsource_FEDORA, NIST National Vulnerability Database

Elsewhere on this site

Related CVEs (same products)

• High CVE-2026-110172 Use after free in Media in Google Chrome prior to 155.0.8059.79 allowed a remote attacker to... 1d
• High CVE-2026-110171 Use after free in Media in Google Chrome prior to 155.0.8059.79 allowed a remote attacker to... 1d
• Medium CVE-2026-110170 Use after free in Bindings in Google Chrome prior to 155.0.8059.79 allowed a remote attacker to... 1d
• High CVE-2026-110162 Use after free in Desktop in Google Chrome prior to 155.0.8059.79 allowed a remote attacker to... 1d
• High CVE-2026-110166 Buffer overflow in Animation in Google Chrome prior to 155.0.8059.79 allowed a remote attacker to... 1d
• High CVE-2026-110163 Use after free in DOM in Google Chrome prior to 155.0.8059.79 allowed a remote attacker to... 1d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

• No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
• No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
• No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2020-6418 is "Google Chromium V8 Type Confusion Vulnerability", rated High. It affects Debian Linux (Debian); versions are in the scope table. It is in CISA KEV: there is evidence of real-world exploitation. CVSS 8.8 describes technical severity. EPSS 78.81% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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