Google Chrome: Confused deputy in Contextual Tasks allows privileged page access
Summary
A confused deputy flaw in the Contextual Tasks feature of Google Chrome before 155.0.8059.39 allows a remote attacker to bypass system access restrictions and reach a privileged page. The attacker must first have compromised the renderer process and then lure a user to a crafted HTML page. The CVSS vector indicates high confidentiality and integrity impact and no availability impact.
Affected
- Google Chrome desktop before 155.0.8059.39
- Distribution packages: Debian bookworm before 155.0.8059.39-1~deb12u1; SUSE SLES 15.7 chromium before 155.0.8059.39-bp157.2.241.1
- Ubuntu chromium-browser: not affected (snap wrapper)
Fixed in
- Google Chrome 155.0.8059.39 (Windows, Linux) and 155.0.8059.40 (Mac), Stable channel, 6 October 2026
- Debian bookworm: 155.0.8059.39-1~deb12u1
- SUSE SLES 15.7: chromium 155.0.8059.39-bp157.2.241.1
Workaround
None published.
Exploitation
- Not known exploited; not listed in the CISA KEV catalog.
- CISA SSVC: Exploitation none, Automatable no, Technical Impact total.
- No public proof of concept found.
Our recommendation
- Update Chrome to 155.0.8059.39 or later (155.0.8059.40 on Mac) on all endpoints.
- Verify the build number on managed devices, as the rollout is phased.
- Check Chromium builds and Linux packages separately, as they may follow other release cycles.
- Monitor for further vendor information on this CVE.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Google Chrome Releases: Stable Channel Update for Desktop chromereleases.googleblog.com
- Chromium bug tracker issues.chromium.org
- Debian OSV osv.dev
- Ubuntu Security Notice ubuntu.com
- VulDB vuldb.com
- SUSE CVE via Vulners vulners.com
- OpenCVE app.opencve.io
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 1 Nov 2026, 20:45.
Original description (NVD)
Confused deputy in Contextual Tasks in Google Chrome prior to 155.0.8059.39 allowed a remote attacker who had compromised the renderer process to bypass system access restrictions into a privileged page 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.
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