Access Control Flaw in V8 in Google Chrome prior to 156.0.8078.73 allowed a remote attacker to read memory via a crafted HTML page
At a glance
Low rather than Medium: UK relevance is 40 of 100, little UK-specific signal so far.
Briefing
- Do not treat uncorroborated claims as confirmed breaches.
Questions to ask IT
- Do we run Google Chrome and Microsoft Edge, and is every instance on version 156.0.8078.73 or later?
- If it is not yet patched, what mitigation is in place, and will the fix be done by 30 Nov?
Next steps
- Confirm whether this affects systems or suppliers in your estate
Vulnerability facts
Full CVE detail CVE-2026-118318- 4.3 · MediumExploitable over the network without any account, but only if a user takes an action, such as opening a file or link. Low impact on confidentiality.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
- Not listed
- ~0.3% estimated chance of attack in 30 days
- Before 156.0.8078.73
- 156.0.8078.73
Versions are as the CVE record states them; check the vendor advisory before planning a fix.
No technical write-up beyond these facts and the summary below yet.
Next steps
- Review the advisory against your asset inventory and patch cadence
Summary
- Microsoft Edge (Chromium-based) ingests Chromium, which addresses this vulnerability. Please see Google Chrome Releases for more information.
Read the original reportMicrosoft Security Update Guide RSS(opens in a new tab)
Products and services involved
- Google Chrome93% match confidence · CVE-2026-118318
- Microsoft Edge98% match confidence · CVE-2026-118318
Part of Google Chrome memory corruption vulnerabilities
- Memory corruption in ANGLE in Google Chrome prior to 156.0.8078.73 allowed a remote attacker to potentially read memory inside the sandbox via a crafted HTML page
- Memory corruption in Skia in Google Chrome prior to 156.0.8078.73 allowed a remote attacker to potentially read memory inside the sandbox via a crafted HTML page
Pulse
Last change 31 Oct · Recheck overdue since 1 Nov 2026, 18:24 UK time
- Story31 Oct 2026, 18:24 UK time · 31 Oct
Linked reporting from Microsoft Security Update Guide RSS (vendor psirt).
Read source (Microsoft Security Update Guide RSS)
1 entry so far. The timeline chart appears once this story has more history.
Sources
Chromium: CVE-2026-118318 Improper access control in V8
How we know
Statements extracted from sources. Higher confidence means stronger corroboration.
- ClaimedHeadline60% confidence
Improper access control in V8 in Google Chrome prior to 156.0.8078.73 allowed a remote attacker to read memory via a crafted HTML page
- ProbableSummary fact75% confidence
Microsoft Edge (Chromium-based) ingests Chromium, which addresses this vulnerability. Please see [Google Chrome Releases](https://chromereleases.googleblog.com/2026) for more information.
- ConfirmedCVE identifier95% confidence
Event involves CVE-2026-118318