CVE-2026-70341: Use after free in Microsoft Edge (Chromium-based) allows an authorized attacker to execute code over a network

Q: How do I fix CVE-2026-70341?

edge: mitigate or apply the listed mitigation; edge: upgrade to 152.0.4191.52; edge: upgrade to 152.0.4191.52. Exact commands for each OS are on this page.

Q: Is CVE-2026-70341 being exploited?

CVE-2026-70341 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-70341 affect?

CVE-2026-70341 affects edge, edge, edge. Severity is high (CVSS 8.5). Use after free in Microsoft Edge (Chromium-based) allows an authorized attacker to execute code over a network.

Q: How urgent is CVE-2026-70341?

Priority 47/100. High severity; On your watchlist

This month

HIGH 8.5WATCHLISTMITIGATEUPGRADEUPGRADE

CVE-2026-70341 is a high-severity flaw (CVSS 8.5) affecting edge, edge, edge. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Use after free in Microsoft Edge (Chromium-based) allows an authorized attacker to execute code over a network.

Why this priority

High severity
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	8.5 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.6% (top 50%)
CISA exploited list	No
Weakness	CWE-416
Published	2026-09-11
Last modified	2026-10-06

Publisher (CNA): Microsoft Corporation · Vendor: microsoft

Last updated 2026-10-06 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-11 16:17 UTCPublished CVE record published
2026-10-06 15:45 UTCUpdated Record last modified

microsoft edge MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy edge || rpm -q edge || edge --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

microsoft edge UPGRADE

Affected: < 152.0.4191.52

Fixed in: 152.0.4191.52

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy edge || rpm -q edge || edge --version

2. UPGRADE to 152.0.4191.52 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade edge

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade edge

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

microsoft edge UPGRADE

Affected: < 152.0.4191.52

Fixed in: 152.0.4191.52

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy edge || rpm -q edge || edge --version

2. UPGRADE to 152.0.4191.52 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade edge

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade edge

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

microsoft edge chromium UPGRADE

Affected: < 152.0.4191.52

Fixed in: 152.0.4191.52

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy edge-chromium || rpm -q edge-chromium || edge-chromium --version

2. UPGRADE to 152.0.4191.52 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade edge-chromium

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade edge-chromium

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-70341?

edge: mitigate or apply the listed mitigation; edge: upgrade to 152.0.4191.52; edge: upgrade to 152.0.4191.52. Exact commands for each OS are on this page.

Is CVE-2026-70341 being exploited?

CVE-2026-70341 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-70341 affect?

CVE-2026-70341 affects edge, edge, edge. Severity is high (CVSS 8.5). Use after free in Microsoft Edge (Chromium-based) allows an authorized attacker to execute code over a network.

How urgent is CVE-2026-70341?

Priority 47/100. High severity; On your watchlist

Software pages

Microsoft Edge vulnerabilities · Chromium vulnerabilities

Related CVEs

CVE-2026-33119 MEDIUM 5.4 UPGRADE User interface (ui) misrepresentation of critical information in Microsoft Edge (Chromium-based) allows an una
CVE-2026-35429 MEDIUM 4.3 UPGRADE User interface (ui) misrepresentation of critical information in Microsoft Edge (Chromium-based) allows an una
CVE-2026-62828 MEDIUM 5.4 MITIGATE Improper input validation in Microsoft Edge for Android allows an unauthorized attacker to perform tampering o
CVE-2026-66310 HIGH 7.7 UPGRADE External control of file name or path in Microsoft Edge for Android allows an unauthorized attacker to disclos

References

← Back to latest CVEs