CVE-2026-87577: Google Chrome · Incorrect Authorization
Affects Google ChromeSource CVE Database V5
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
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 16% 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:NExploitation evidence
Disclosed: evidence found.
CVE published 9 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| GoogleChrome | Affected
| Fixed in
|
AI-suggested
Users should update Google Chrome to version 153.0.8010.36 or later, where this vulnerability is fixed. No additional mitigation is required as the patch fully addresses the issue.
Description
A vulnerability in Google Chrome prior to version 153.0.8010.36 allowed a remote attacker to bypass the web origin policy via a crafted HTML page, due to incorrect authorization in the Isolated feature. This issue was assigned CVE-2026-87577 and has a medium severity rating. The flaw was fixed in Chrome version 153.0.8010.36.