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VulnerabilityPublished

CVE-2026-87573: Google Chrome · Improper Input Validation

Affects Google ChromeSource CVE Database V5

0

Not known to be exploited · CVSS 4.3 Medium : upgrade to 153.0.8010.36 when convenient.

Data as of 26 Oct 2026, 11:07 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 18% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CISA SSVC
Exploitation
No evidence of active exploitation and no public proof of concept
Automatable
Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact
Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-09-09.

Patch
Available – fixed in 153.0.8010.36
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 9 Sep 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 153.0.8010.36.

Affected software

ProductAffectedFixed in
GoogleChromeAffected
  • >=153.0.8010.36 <153.0.8010.36
Fixed in
  • 153.0.8010.36

AI-suggested

Users and administrators should update Google Chrome to version 153.0.8010.36 or later to remediate this vulnerability. The vendor has provided an official fix, and applying this update fully addresses the issue.

Description

CVE-2026-87573 is a medium severity vulnerability in Google Chrome prior to version 153.0.8010.36. It involves improper input validation in the network component, which could allow a remote attacker to bypass the web origin policy using a crafted HTML page. This flaw has been fixed in Chrome version 153.0.8010.36.

References

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