CVE-2026-78976: Improper input validation in Google Chrome
Description
CVE-2026-78976 is a medium severity vulnerability in Google Chrome's StorageAccessAPI prior to version 152.0.7977.65. It involves improper input validation that allows a remote attacker, who has already compromised the renderer process, to bypass the web origin policy using a crafted HTML page. This vulnerability impacts confidentiality but does not affect integrity or availability.
CVSS v3.1
Score 4.3medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Google Chrome versions before 152.0.7977.65 arises from improper input validation in the StorageAccessAPI. An attacker with control over the renderer process can exploit this flaw to bypass the web origin policy, potentially allowing unauthorized access to web storage data. The CVSS 3.1 base score is 4.3, indicating a medium severity. The vulnerability does not affect integrity or availability and requires user interaction.
Potential Impact
The vulnerability allows bypassing the web origin policy, which could lead to unauthorized access to certain web storage data. The impact is limited to confidentiality with no known effects on integrity or availability. Exploitation requires that the attacker has already compromised the renderer process and involves user interaction.
Mitigation Recommendations
A fix is available in Google Chrome version 152.0.7977.65. Users and administrators should update to this version or later to remediate the vulnerability. No additional mitigation steps are indicated by the vendor advisory.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-3vg3-5xj5-c63w
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-78976"]
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a91a878acd9273b49069db5
Added to database: 08/28/2026, 15:25:44 UTC
Last enriched: 09/18/2026, 02:01:14 UTC
Last updated: 10/13/2026, 18:48:24 UTC
Views: 56
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