CVE-2026-11259
MEDIUMCVSS 4.3/10EPSS 0.18%
Last modified
CVE-2026-11259 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. Insufficient validation of untrusted input in Cast in Google Chrome prior to 149.0.7827.53 allowed a remote attacker to bypass same origin policy via a crafted HTML page. (Chromium security severity: Low). EPSS estimates a 0.18% chance of exploitation in the next 30 days.
Description
Insufficient validation of untrusted input in Cast in Google Chrome prior to 149.0.7827.53 allowed a remote attacker to bypass same origin policy via a crafted HTML page. (Chromium security severity: Low)
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Chrome | < 149.0.7827.53 |
References
- https://issues.chromium.org/issues/499215943Permissions Required
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-11259?
Insufficient validation of untrusted input in Cast in Google Chrome prior to 149.0.7827.53 allowed a remote attacker to bypass same origin policy via a crafted HTML page. (Chromium security severity: Low)
How severe is CVE-2026-11259?
CVE-2026-11259 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 0.18% probability of exploitation in the next 30 days.
How do I fix CVE-2026-11259?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2026-11259?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST