CVE-2026-87551: Improper certificate validation in Google Chrome
Description
Improper certificate validation in CORS in Google Chrome prior to 153.0.8010.36 allowed a remote attacker leveraging social engineering to bypass web origin policy via crafted network traffic. (Chromium security severity: Low)
CVSS v3.1
Score 4.3medium
Affected software
Chrome
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Google Chrome versions before 153.0.8010.36 involves improper validation of certificates in the Cross-Origin Resource Sharing (CORS) mechanism. An attacker could exploit this by crafting network traffic and leveraging social engineering to bypass the web origin policy, potentially allowing unauthorized cross-origin interactions. The issue was assigned CVE-2026-87551 and is rated with a CVSS 3.1 base score of 4.3 (medium severity).
Potential Impact
The impact is limited to the ability of a remote attacker to bypass the web origin policy through crafted network traffic combined with social engineering. There is no confidentiality or availability impact reported, and the integrity impact is low. This means the vulnerability could allow limited unauthorized actions but does not lead to data disclosure or system compromise by itself.
Mitigation Recommendations
A stable channel update for Google Chrome addressing this issue is available in version 153.0.8010.36. Users and administrators should update to this version or later to remediate the vulnerability. Refer to the official Google Chrome stable channel update announcement for details: https://chromereleases.googleblog.com/2026/09/stable-channel-update-for-desktop_0808145027.html
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Chrome
- Date Reserved
- 2026-09-08T22:40:24.115Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://chromereleases.googleblog.com/2026/09/stable-channel-update-for-desktop_0808145027.html","vendor":"Google"}]
Threat ID: 6aa0b182acd9273b49812813
Added to database: 09/09/2026, 01:08:18 UTC
Last enriched: 09/17/2026, 01:06:16 UTC
Last updated: 10/22/2026, 13:15:24 UTC
Views: 21
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