What is the CVSS score of CVE-2025-9479?

CVE-2025-9479 has a CVSS 3.1 base score of 4.3 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L. EPSS exploitation probability: 0.1%.

Which versions of Chrome are affected by CVE-2025-9479?

Organizations using V8 in Google Chrome should be aware of moderate risk from CVE-2025-9479, a out-of-bounds read vulnerability rated CVSS 4.3.

Is there a public PoC exploit available for CVE-2025-9479?

Yes, a public proof-of-concept exploit is available for CVE-2025-9479. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2025-9479?

During next maintenance window: Identify affected systems running V8 in Google Chrome and apply vendor patches when convenient. Monitor vendor channels for patch availability.

Chrome CVE-2025-9479

MEDIUM

Out-of-bounds Read (CWE-125)

2025-11-14 chrome-cve-admin@google.com

Google Buffer Overflow Information Disclosure Chrome Red Hat Suse

4.3

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

4.3 MEDIUM

AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

SUSE

MEDIUM

qualitative

Red Hat

6.5 MEDIUM

qualitative

Primary rating from NVD.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:22 vuln.today

PoC Detected

Nov 17, 2025 - 12:18 vuln.today

Public exploit code

CVE Published

Nov 14, 2025 - 03:15 nvd

MEDIUM 4.3

DescriptionCVE.org

Out of bounds read in V8 in Google Chrome prior to 133.0.6943.141 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: Medium)

AnalysisAI

Out of bounds read in V8 in Google Chrome prior to 133.0.6943.141 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Out-of-bounds Read (CWE-125), which allows attackers to read data from memory outside the intended buffer boundaries. Out of bounds read in V8 in Google Chrome prior to 133.0.6943.141 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: Medium) Affected products include: Google Chrome. Version information: prior to 133.0.6943.141.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate array indices and buffer lengths. Use memory-safe languages. Enable AddressSanitizer during testing.