CVSS 3.1
8.8 highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HCVE-2026-126863 google chrome: Use After Free
High (8.8) in google chrome. EPSS 0.3% estimated probability of exploitation activity in the next 30 days.
On this page
Use after free in HTML in Google Chrome prior to 157.0.8103.78 allowed a remote attacker to potentially execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: High)
Severity
- EPSS
- 0.3% estimated probability of exploitation activity in the next 30 days; 19th percentile. Scored 2026-11-13. A forecast for this CVE across the internet, not for your own systems.
- CISA's assessment (SSVC)
- Exploitation: none · Automatable: no · Technical impact: total, assessed 2026-11-12. From CISA's Vulnrichment in the CVE List: whether it is exploited, whether exploiting it can be automated, and how much control it gives.
- CWE
- CWE-416 Use After Free
- Published
- Modified
- Assigned by
- Chrome (CNA)
- NVD analysis
- Analyzed
- Record from
- the NVD, synced
Ask an AI about this CVE
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Explain CVE-2026-126863 for an engineer deciding whether to act. Use https://cve.bz/api/public/cves/CVE-2026-126863?via=ask-ai-copy and https://cve.bz/cve/CVE-2026-126863?via=ask-ai-copy as the source of truth: what is affected and which versions fix it, whether it is in CISA KEV, public exploits, and its EPSS (an internet-wide 30-day estimate of exploitation activity, not a forecast for my systems). If they give no fixed versions, use the CVE record https://cveawg.mitre.org/api/cve/CVE-2026-126863 or the vendor advisory, not third-party mirrors. Tell me how to check whether I am affected and how to verify a fix. Cite the sources and say where they are uncertain.Opens a third-party assistant; its answer is its own, not cve.bz's. The prompt holds only this CVE's id and public links.
Badge for a README or a site
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HTML:
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Affected
Versions
From the CNA's record in the CVE List.
| Product | Affected |
|---|---|
| Google Chrome | from 157.0.8103.78 before 157.0.8103.78 |
Fix and patched versions
- Vendor advisory: https://chromereleases.googleblog.com/2026/11/stable-channel-update-for-desktop_01744469280.html
Linux distributions
| Distribution | Release | Package | Fixed in | Advisory |
|---|---|---|---|---|
| Debian | 12, 13, 14 | chromium | no fix listed | DEBIAN-CVE-2026-126863 |
From the distributions' data via OSV.dev: the Debian Security Tracker. Modified: reformatted and linked to CVE records. Credits. On the distributions' own pages: Debian.
Red Hat
Red Hat rates this Important.
Red Hat Product Security rates the severity of this flaw as determined by the Google Chrome Security Advisory.
Operational controls and environment hardening can partially reduce exposure:
1. Restrict browsing activity: Avoid navigating to untrusted websites or processing HTML files from unverified sources within chromium-browser.
2. Maintain sandboxing: Ensure chromium-browser is executed with its default sandbox protections active. Never pass the `--no-sandbox` command-line argument, as the sandbox restricts code execution from escaping into the broader operating system.
3. Remove the package if unneeded: On systems where web browsing is not strictly required, remove the chromium-browser package:
# dnf remove chromium-browser
Caveats:
Limiting web navigation may disrupt regular desktop workflows. Removing the package completely removes the browser application for local users.
Contains Red Hat Security Data © Red Hat, Inc., licensed under CC BY 4.0. Source: https://access.redhat.com/security/data. Modified: reformatted. Red Hat's page for CVE-2026-126863.
History
- Scored 8.8 high
- Analyzed by the NVD
Changes since this site first stored the record. The same for every record: /api/public/changes.