Patch Forecast
Amber warning
Patch this week.

CVE-2026-118337

Chrome: access control flaw

Risk score
63/100
CVSS
9.3 v3.1
Exploit chance (30 days)
0.2%
Published
27 Oct 2026

Open in the live forecast Today's forecast

What to know

What it is
A vulnerability in Google Chrome prior to version 156.0.8078.73 allows a remote attacker to bypass web origin policy via a crafted HTML page, potentially leading to high impact.
Affected
{'product': 'Google Chrome', 'version': 'prior to 156.0.8078.73'}
Fix
Upgrade to version 156.0.8078.73 or later
Exploitation
No known exploitation

Story map

Story map: ChromeTHE FLAWSTHE FIXCVE-2026-118337Access control flawCVSS 9.3 · EPSS 0%CVE-2026-110136Use-after-free can lead toremote code executionCVSS 9.6 · EPSS 0%CVE-2026-106329Incorrect authorisation canlead to remote code executionCVSS 9.6 · EPSS 0%CVE-2026-106417Integer overflow can lead toremote code executionCVSS 9.6 · EPSS 0%Upgrade Chrome156.0.8078.73 · 155.0.8059.79· 155.0.8059.39or later on your release lineWho is exposedChrome before 155.0.8059.79AMBER · PATCH THIS WEEKChromeUse after free in PDF in GoogleChrome prior to 155.0.8059.79allowed a remote attacker toexecute arbitrary code outsidethe sandbox via a crafted HTMLpage. (Chromium securityseverity: Critical)Where it standsNo known exploitationHOW IT UNFOLDEDOfficial record on the left, the press on the right, oldest first.16 Oct · Microsoft Security Response CenterChromium CVE-2026-110136: Use after free16 Oct · Microsoft Security Response CenterChromium CVE-2026-106329: Incorrectauthorization16 Oct · Microsoft Security Response CenterChromium CVE-2026-106417: Integer overflowCONNECTS TOSame weaknessAccess control flaw (CWE-284)399 other warnings in 30 days →Same productEarlier Chrome warnings397 in the last 90 days →
Story map: the flaws, the fix, how it unfolded and what it connects to. Boxes link to the record or article.

At a glance

Chrome: Amber, patch this week. Use after free in PDF in Google Chrome prior to 155.0.8059.79 allowed a remote attacker to execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Critical)

The flaws

  • CVE-2026-118337: Access control flaw (CVSS 9.3 · EPSS 0%)
  • CVE-2026-110136: Use-after-free can lead to remote code execution (CVSS 9.6 · EPSS 0%)
  • CVE-2026-106329: Incorrect authorisation can lead to remote code execution (CVSS 9.6 · EPSS 0%)
  • CVE-2026-106417: Integer overflow can lead to remote code execution (CVSS 9.6 · EPSS 0%)

The fix

Upgrade Chrome: 156.0.8078.73 · 155.0.8059.79 · 155.0.8059.39 or later on your release line

Who is exposed: Chrome before 155.0.8059.79

Where it stands

  • No known exploitation

How it unfolded

  1. 16 Oct, Microsoft Security Response Center (official): Chromium CVE-2026-110136: Use after free
  2. 16 Oct, Microsoft Security Response Center (official): Chromium CVE-2026-106329: Incorrect authorization
  3. 16 Oct, Microsoft Security Response Center (official): Chromium CVE-2026-106417: Integer overflow

Connects to

Why it is Amber

  • CVSS 9.3 critical
  • Remotely exploitable without logging in

References

Original description

Improper access control in Forms in Google Chrome prior to 156.0.8078.73 allowed a remote attacker to bypass web origin policy via a crafted HTML page. (Chromium security severity: High)

Last activity 27 Oct 2026. Patch Forecast updates every hour.