Google Chrome: Incorrect authorization in WebProtect allows information disclosure
Summary
Google Chrome before 155.0.8059.39 contains an incorrect authorization flaw in the WebProtect component (CWE-863). A remote attacker using social engineering can get a user to open a crafted HTML page and obtain sensitive information. The attack requires the user to load the page and interact with it, but no account is needed. Google rates the issue Medium in Chromium; NVD scores it 8.8 (CVSS 3.1), which is likely conservative for the expected confidentiality impact.
Affected
- Google Chrome prior to 155.0.8059.39
- Other Chromium-based browsers and Linux Chromium packages may be affected until they ship the fix (Unknown for Brave, Vivaldi and other forks)
Fixed in
- Google Chrome 155.0.8059.39 or later (Windows and Mac: 155.0.8059.39/.40; later 155 builds also include the fix, use the latest build)
- Microsoft Edge: 155.0.4283.62 (desktop) and 155.0.4283.61 (Android), according to the Edge bulletin
Workaround
- Unknown. No vendor-documented workaround exists; apply the update.
Exploitation
- No evidence of exploitation in the wild found; not listed in CISA KEV according to secondary sources (confirm in the KEV catalogue).
- EPSS: unknown.
- No public proof of concept found in searches.
Our recommendation
- Update all Chrome, Edge and other Chromium-based browsers to Chrome 155.0.8059.39 or later, preferably the latest 155 build.
- Enforce browser updates via management tooling and verify the installed version on all endpoints, including Linux systems with Chromium packages.
- Patch the entire Chrome 155 release, which contains further security fixes, not only this CVE.
- Warn users about links to untrusted pages and phishing attempts.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Chrome Releases: Stable Channel Update for Desktop chromereleases.googleblog.com
- Chromium issue tracker issues.chromium.org
- Malwarebytes: Update Chrome to fix critical security issues www.malwarebytes.com
- Microsoft Edge multiple vulnerabilities (HKCERT) www.hkcert.org
- SUSE CVE record (vulners) vulners.com
- Strix CVE page www.strix.ai
- CISA KEV status (HOL Guard) hol.org
- Chrome 155 security fixes (GHacks) www.ghacks.net
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 31 Oct 2026, 21:47.
Original description (NVD)
Incorrect authorization in WebProtect in Google Chrome prior to 155.0.8059.39 allowed a remote attacker leveraging social engineering to obtain sensitive information via a crafted HTML page. (Chromium security severity: Medium)
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
Affected? We can help.
We check whether your systems are affected, install updates and close the gap – continuously with the System Health Checker if you wish.