Uninitialized resource in ANGLE in Google Chrome on on Windows prior to 155.0.8059.39 allowed a remote attacker to read memory outside the sandbox via a crafted HTML page
At a glance
~0.2% estimated chance of attack in 30 days. Exploitation not confirmed.
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 155.0.8059.39 or later?
- If it is not yet patched, what mitigation is in place, and will the fix be done by 2 Dec?
Next steps
- Confirm whether this affects systems or suppliers in your estate
Vulnerability facts
Full CVE detail CVE-2026-106258- 4.7 · 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, and it can reach beyond the vulnerable system.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N
- Not listed
- ~0.2% estimated chance of attack in 30 days
- Before 155.0.8059.39
- 155.0.8059.39
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.
- CVE-2026-106258 has an estimated ~0.2% chance of attack in 30 days (11.6th percentile) as of 2026-10-16 — probability signal, not confirmed exploitation
Read the original reportMicrosoft Security Update Guide RSS(opens in a new tab)
Products and services involved
- Google Chrome93% match confidence · CVE-2026-106258
- Microsoft Edge98% match confidence · CVE-2026-106258
Part of Multiple Chrome and Adobe vulnerabilities disclosed
- UI misrepresentation in Payments in Google Chrome prior to 155.0.8059.39 allowed a remote attacker leveraging social engineering to spoof UI elements via a crafted HTML page
- Incorrect reference resolution in Browser in Google Chrome on on Mac prior to 155.0.8059.39 allowed a remote attacker leveraging social engineering to obtain sensitive information…
- Use after free in Select in Google Chrome prior to 155.0.8059.39 allowed a remote attacker leveraging social engineering to execute arbitrary code inside the sandbox via a crafted…
- Missing authorization in Web Authentication (Passkeys & Security Keys) in Google Chrome prior to 155.0.8059.39 allowed a remote attacker to spoof UI elements via a crafted HTML pa…
Pulse
Last checked 6d ago · Recheck overdue since 3 Nov 2026, 08:37 UK time
Attack-likelihood ranking among CVEs rose from the 11.6% to 12.5%.
Sources
Chromium CVE-2026-106258: Uninitialized resource
How we know
Statements extracted from sources. Higher confidence means stronger corroboration.
- ClaimedHeadline60% confidence
Uninitialized resource in ANGLE in Google Chrome on on Windows prior to 155.0.8059.39 allowed a remote attacker to read memory outside the sandbox 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-2026-106258
- ConfirmedEstimated attack likelihood95% confidence
CVE-2026-106258 has an estimated ~0.2% chance of attack in 30 days (11.6th percentile) as of 2026-10-16 — probability signal, not confirmed exploitation