CVE-2026-78955: Observable discrepancy in Google Chrome
Description
CVE-2026-78955 is a medium severity vulnerability in Google Chrome prior to version 152.0.7977.65. It involves an observable discrepancy in PerformanceAPIs that could allow a remote attacker to obtain cross-origin data by crafting a malicious HTML page. This vulnerability affects the confidentiality of data but does not impact integrity or availability.
CVSS v3.1
Score 6.5medium
Affected software
Chrome
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Google Chrome versions before 152.0.7977.65 arises from an observable discrepancy in the PerformanceAPIs. A remote attacker can exploit this flaw by delivering a crafted HTML page to potentially access cross-origin data, violating the same-origin policy. The CVSS score is 6.5, indicating a medium severity level. The issue was publicly disclosed with a vendor advisory indicating a stable channel update that addresses this flaw.
Potential Impact
The vulnerability allows unauthorized disclosure of cross-origin data, compromising confidentiality. There is no impact on data integrity or availability. No known exploits are reported in the wild at this time.
Mitigation Recommendations
A fixed version, Google Chrome 152.0.7977.65, is available. Users should update to this version or later to remediate the vulnerability. The vendor advisory confirms the availability of this official fix.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Chrome
- Date Reserved
- 2026-08-25T06:05:02.739Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://chromereleases.googleblog.com/2026/08/stable-channel-update-for-desktop_0256176589.html","vendor":"Google"}]
Threat ID: 6a8df9bcacd9273b49ac6df5
Added to database: 08/25/2026, 20:23:24 UTC
Last enriched: 09/10/2026, 17:09:05 UTC
Last updated: 10/10/2026, 06:48:19 UTC
Views: 55
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.