What is CVE-2026-91742?

CVE-2026-91742 is a medium-severity vulnerability in Google Chrome, classified under Unintended Proxy or Intermediary (Confused Deputy). CVSS score: 4.8/10. Published 2026-09-15.

How severe is CVE-2026-91742?

Medium severity. CVSS v3 base score is 4.8 out of 10.

Vulnerability in Google Chrome

CVE-2026-91742

Confused deputy in PriceTracking in Google Chrome on on iOS prior to 153.0.8010.47 allowed a remote attacker leveraging social engineering to bypass system access restrictions into a privileged page via crafted network traffic. (Chromium security severity: Medium)

Published 2026-09-15 · last modified 2026-09-21.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.002 (9.2th percentile), scored 2026-10-31.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 9th percentile — 9.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Google Chrome

Weakness classification (CWE)

CWE-441 — Unintended Proxy or Intermediary (Confused Deputy)

References

chromereleases.googleblog.com/2026/09/stable-channel-update-for-desktop_0541751… (Release Notes, Vendor Advisory)
issues.chromium.org/issues/513858387 (Permissions Required)

Frequently asked questions

What is CVE-2026-91742?: CVE-2026-91742 is a medium-severity vulnerability in Google Chrome, classified under Unintended Proxy or Intermediary (Confused Deputy). CVSS score: 4.8/10. Published 2026-09-15.
How severe is CVE-2026-91742?: Medium severity. CVSS v3 base score is 4.8 out of 10.