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VulnerabilityPublished Updated

CVE-2026-5911: Google Chrome · Policy Bypass

Affects Google ChromeSource CVE Database V5

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Not known to be exploited · CVSS 4.3 Medium : upgrade to 147.0.7727.55 when convenient.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score
4.3Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 5% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 147.0.7727.55
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 8 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Upgrade Google Chrome to 147.0.7727.55.

Affected software

ProductAffectedFixed in
GoogleChromeAffected
  • >=147.0.7727.55 <147.0.7727.55
Fixed in
  • 147.0.7727.55

AI-suggested

Google has published a stable channel update for Chrome that presumably addresses this vulnerability. However, the exact patch status is not explicitly confirmed in the advisory provided. Users should update to Chrome version 147.0.7727.55 or later to ensure protection.

Description

Policy bypass in ServiceWorkers in Google Chrome prior to 147.0.7727.55 allowed a remote attacker to bypass content security policy via a crafted HTML page. (Chromium security severity: Low)

References

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