CVE-2026-87491
Act now ● On CISA KEV — actively exploited
Actively exploited — on the CISA KEV list.
CVSS base
8.8
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS — probability of exploitation (30 days)
1.0%
61.2th percentile
CISA KEV
Listed
Added 2026-09-09 · patch by 2026-09-23
Weakness / dates
CWE-787
Published 2026-09-09 · modified 2026-09-10
CVSS breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
| Attack Vector | N | Network |
| Attack Complexity | L | Low |
| Privileges Required | N | None |
| User Interaction | R | Required |
| Scope | U | Unchanged |
| Confidentiality | H | High |
| Integrity | H | High |
| Availability | H | High |
Timeline
- 2026-09-09 — Published (NVD)
- 2026-09-09 — Added to CISA KEV (actively exploited)
- 2026-09-23 — CISA patch-by deadline
- 2026-09-10 — Last modified (NVD)
Description
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)