CVE-2026-87491
KEV: known exploited SSVC: activeCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack conditions and impact
Derived from the CISA-ADP (via NVD) CVSS 3.1 vector| Metric | Value | Meaning |
|---|---|---|
| Attack vector AV | N | Network |
| Attack complexity AC | L | Low (easy) |
| Privileges required PR | N | None |
| User interaction UI | R | Required |
| Scope S | U | Unchanged |
| Confidentiality C | H | High |
| Integrity I | H | High |
| Availability A | H | High |
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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)
CISA KEV entry
Google Chromium V8 Out of Bounds Write Vulnerability — Google / Chromium V8
Google Chromium V8 contains an out of bounds write vulnerability that allows a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.
Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
https://chromereleases.googleblog.com/2026/09/stable-channel-update-for-desktop_0808145027.html ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-87491
CVSS assessments
| Provider | Version | Score | Vector |
|---|---|---|---|
| NVD / 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary) | 3.1 | 8.8 HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| ADP / CISA-ADP | 3.1 | 8.8 HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
Affected products and packages
CNA (CVE.org)
| Vendor | Product | Versions |
|---|---|---|
| Chrome | affected: 153.0.8010.36 … < 153.0.8010.36 |
NVD CPE (1)
Show CPE list
| Vendor | Product | Range | CPE |
|---|---|---|---|
| chrome | < 153.0.8010.36 | cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:* |
Linux distribution status
Red Hat ↗ important
Red Hat Product Security rates the severity of this flaw as determined by the Google Chrome Security Advisory.
No per-package status.
Debian ↗
| Release | Package | Status | Fixed version / notes |
|---|---|---|---|
| bookworm | chromium | resolved not yet assigned | 153.0.8010.52-1~deb12u1 |
| forky | chromium | resolved not yet assigned | 153.0.8010.47-1 |
| sid | chromium | resolved not yet assigned | 153.0.8010.47-1 |
| trixie | chromium | resolved not yet assigned | 153.0.8010.47-2~deb13u1 |
Ubuntu ↗
No record
References (3)
- https://chromereleases.googleblog.com/2026/09/stable-channel-update-for-desktop_0808145027.html NVD, CNA Release NotesVendor Advisory
- https://issues.chromium.org/issues/543557673 NVD, CNA Permissions Required
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-87491 NVD, ADP CISA-ADP US Government Resourcegovernment-resource