PatchTheCVECVE-2026-121194: Missing authorization in SiteIsolation in Google Chrome prior to 157.0.8103.38 allowed a remote attacker who h
CVE-2026-121194 is a medium-severity flaw (CVSS 5.3) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Missing authorization in SiteIsolation in Google Chrome prior to 157.0.8103.38 allowed a remote attacker who had compromised the renderer process to obtain sensitive information via a crafted PDF file. (Chromium security severity: Medium)
Why this priority
- No elevated risk signals yet
No fix is published yet: follow the downgrade or mitigation steps.
Risk facts
| CVSS score | 5.3 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | High |
| Privileges needed | None |
| User interaction | Required |
| EPSS exploit chance | 0.2% (top 94%) |
| CISA exploited list | No |
| Weakness | CWE-862 |
| Published | 2026-11-03 |
| Last modified | 2026-11-04 |
Last updated 2026-11-04 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Timeline
- Published CVE record published
- Updated Record last modified
Advisories and coverage
Research and news
- VulDB Recent Entries: CVE-2026-121194 | Google Chrome up to 156.0.8078.79 SiteIsolation improper authorization 2026-11-03
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-121194?
No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.
Is CVE-2026-121194 being exploited?
CVE-2026-121194 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-121194 affect?
CVE-2026-121194 affects affected software. Severity is medium (CVSS 5.3). Missing authorization in SiteIsolation in Google Chrome prior to 157.0.8103.38 allowed a remote attacker who had compromised the renderer process to obtain sensitive information via a crafted PDF file. (Chromium security severity: Medium)
How urgent is CVE-2026-121194?
Priority 20/100. No elevated risk signals yet.
Software pages
Google Chrome vulnerabilities · Chromium vulnerabilities