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VulnerabilityPublished

CVE-2026-17977: Google Chrome · Policy Bypass

Affects Google ChromeSource CVE Database V5

0

Not known to be exploited · CVSS 4.3 Medium : upgrade to 151.0.7922.72 when convenient.

Data as of 27 Oct 2026, 17:11 UTC

CVSS 3.1 base score
4.3Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 12% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 151.0.7922.72
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 30 Jul 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: 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 26 Oct 2026.

What to do

Upgrade Google Chrome to 151.0.7922.72.

Affected software

ProductAffectedFixed in
GoogleChromeAffected
  • >=151.0.7922.72 <151.0.7922.72
Fixed in
  • 151.0.7922.72

AI-suggested

The vendor advisory linked suggests a stable channel update for Chrome but does not explicitly confirm the availability of a patch or remediation level. Since the affected version is prior to 151.0.7922.72, updating to version 151.0.7922.72 or later is recommended to address this vulnerability. Patch status is not explicitly confirmed; users should consult the vendor advisory for the latest remediation guidance.

Description

CVE-2026-17977 is a policy bypass vulnerability in the CSS implementation of Google Chrome versions prior to 151.0.7922.72. This flaw allows a remote attacker to leak cross-origin data by crafting a malicious HTML page. The vulnerability has a CVSS score of 4.3, indicating medium severity, and does not impact integrity or availability. No known exploits are reported in the wild. A vendor advisory is available but does not explicitly confirm patch status.

References

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