Google Chrome: Use after free in ReadingMode
Summary
A use-after-free flaw in the ReadingMode feature of Google Chrome allows a remote attacker to execute arbitrary code inside the browser sandbox. The attacker needs to lure a user into opening a crafted HTML page. Chromium rates the bug Low, and the CNA text describes impact limited to the sandbox, so full system compromise would likely require a second vulnerability.
Affected
- Google Chrome prior to 156.0.8078.47 (desktop)
- Chromium-based browsers that include the vulnerable code, such as Microsoft Edge, depending on their release
- Ubuntu chromium-browser (snap) is marked not affected
Fixed in
- Google Chrome 156.0.8078.47 or later; newer Stable builds are available (for example 156.0.8078.79/.80 per third-party listings)
- Microsoft Edge 156.0.4314.42 or later (per HKCERT bulletin)
- Debian chromium updates under DSA 6577-1 and DLA 4853-1 (fixed versions unverified)
Workaround
- Unknown. No vendor-documented workaround; applying the update is the remedy.
Exploitation
- No known exploitation in the wild; not listed as KEV according to a third-party aggregator.
- No public proof-of-concept found.
- CISA SSVC: exploitation none, automatable no, technical impact total.
Our recommendation
- Update Chrome and Chromium-based Edge on all endpoints to the newest Stable build.
- Check managed installations for stopped auto-updates and verify the installed version.
- Monitor for updates from Debian and other Linux distributions for their Chromium packages.
- Prioritise the update according to the Chromium Low rating and the sandbox-only impact, but do not postpone it, since the CVSS score is 8.8.
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
- Ubuntu CVE-2026-113274 ubuntu.com
- HKCERT Microsoft Edge security bulletin www.hkcert.org
- Vulners CVE-2026-113274 vulners.com
- Strix CVE-2026-113274 www.strix.ai
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, 12:21.
Original description (NVD)
Use after free in ReadingMode in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: Low)
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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