CVE-2026-87491: listed in the CISA KEV catalog

CVE-2026-87491 · KEV 2026-09-09 · patch available

Out of bounds write in V8 in Google Chrome prior to 153.0.8010.36 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: Medium)

Is CVE-2026-87491 exploited?

• Listed in the CISA KEV catalog on 2026-09-09.
• Federal remediation due 2026-09-23.
• Past that date by 36 days.
• Public exploit code: none found in monitored sources.

Which products and versions are affected?

• Google · Chrome · >= 153.0.8010.36, < 153.0.8010.36
• Microsoft · Microsoft Edge (Chromium-based)

Is there a patch?

Yes. Update to one of these or later:

• Release Notes

From Microsoft's Security Update Guide · Microsoft advisory

What PlainSec published about CVE-2026-87491

• BlueMoon spreads beyond Violet Typhoon (2026-09-10)
• UTA0565 broadens Chrome zero-day delivery (2026-09-09)

Primary sources

• NVD record
• CISA KEV catalog
• Google advisory

What this record does not say

• No CVSS score from NVD.
• No EPSS score.

KEV and EPSS are re-checked daily. Record last updated 2026-10-23.