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Vulnerabilities

Vulnerability · CVE-2026-121236

Improper input validation in Network in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to bypass web origin policy via a crafted HTML page.

Published Nov 3, 2026 · catalog updated Nov 4, 2026 · Improper input validation in

Last checked Nov 5, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-121236. EPSS is 0.24%. Act only if a listed version of Improper input validation in is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Improper input validation in).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Unknown—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.24%
Remediation
Advisory link
Affected products
Debian:12 chromium · Debian:13 chromium · Debian:14 chromium

Improper input validation in Network in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to bypass web origin policy via a crafted HTML page. (Chromium security severity: Low)

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • Debian:12 chromium113.0.5672.126-1, 114.0.5735.106-1, 114.0.5735.106-1~deb11u1
  • Debian:13 chromium138.0.7204.183-1, 139.0.7258.127-1, 139.0.7258.127-1~deb12u1
  • Debian:14 chromium138.0.7204.183-1, 139.0.7258.127-1, 139.0.7258.127-1~deb12u1

How to fix CVE-2026-121236

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-121236. EPSS is 0.24%. Act only if a listed version of Improper input validation in is installed.

Which versions are affected?

Compare what you have installed with 113.0.5672.126-1, 114.0.5735.106-1, 114.0.5735.106-1~deb11u1, 138.0.7204.183-1, 139.0.7258.127-1, 139.0.7258.127-1~deb12u1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.24%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Debian security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Nov 3, 2026 · OpenSSF OSV / OSV Scanner

    Detected

    Improper input validation in Network in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to bypass web origin policy via a crafted HTML page. (Chromium security severity: Low)

  2. Nov 4, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    Improper input validation in Network in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to bypass web origin policy via a crafted HTML page. (Chromium security severity: Low)

Sources

  • CVE.orgVulnerability recordCVE-2026-121236

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-121236

    30-day exploitation probability 0.24%

    first.org
  • OpenSSF OSV / OSV ScannerPackage advisoryDEBIAN-CVE-2026-121236
    osv.dev
  • Trivy Vulnerability DBPackage advisoryDEBIAN-CVE-2026-121236

    Improper input validation in Network in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to bypass web origin policy via a crafted HTML page. (Chromium security severity: Low)

    osv.dev

References

Freshness

Last verified in this catalog Nov 5, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 5, 2026
  • CVE.orgNov 4, 2026
  • Trivy Vulnerability DBNov 4, 2026
  • OpenSSF OSV / OSV ScannerNov 4, 2026