# CVE-2026-121198

Same-origin policy bypass in Chrome WebUI via crafted page.

- Page: https://www.vulneraibility.com/cve/CVE-2026-121198
- CVSS: 8.8
- Known exploited: not in CISA KEV as of our last sync
- CISA SSVC: exploitation none, automatable no, technical impact total (assessed 2026-11-04)
- Weakness: CWE-441
- Published: 2026-11-03

## Affected versions

- Google Chrome: affected < 157.0.8103.38

A version outside these ranges is not a statement that it is unaffected.

## Impact

Attackers can bypass same-origin policy via a crafted HTML page, enabling token/cookie theft and unauthorized cross-origin actions.

## Action

Immediate action required

## Recommendation

Update Chrome to 157.0.8103.38 or later immediately

## References

- [other] https://chromereleases.googleblog.com/2026/11/stable-channel-update-for-desktop.html
- [other] https://issues.chromium.org/issues/563340726

---
Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.