Skip to main content
VulnerabilityPublished

CVE-2026-87508: Google Chrome · Incorrect Authorization

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, 10:12 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 19% 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, where this vulnerability is fixed. No additional mitigation steps are indicated by the vendor advisory.

Description

CVE-2026-87508 is a medium severity vulnerability in Google Chrome prior to version 153.0.8010.36. It involves incorrect authorization in the Loader component, allowing a remote attacker to bypass the web origin policy via a crafted HTML page. This flaw could lead to limited confidentiality impact but does not affect integrity or availability.

References

Community reviews

Loading reviews…