CVE-2026-84324
CRITICAL 9 ALL-YEARSUse after free in Proxy in Google Chrome prior to 152.0.7977.75 allowed a remote attacker to execute arbitrary code outside the sandbox via crafted network traffic. (Chromium security severity: High)
Severe if exploited (CVSS 9), but no confirmed exploitation. Patch on a normal cadence.
Exploitation likelihood
0.5%chance of exploitation in 30 days · 40th percentile
Impact if exploited
9CVSS 3.1 · CRITICAL · ADP
- ConfidentialityHigh
- IntegrityHigh
- AvailabilityHigh
What an attacker needs
- ✓Access: Reachable over the network — no local access needed
- ✓Privileges: No account or privileges required
- ✓User interaction: No user interaction needed
- ⚠Complexity: Needs a race window or specific setup
✓ lowers the bar for an attacker · ⚠ raises it
Proof of concept
No public PoC is currently catalogued.
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Tracked sources are checked weekly for the full archive, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.
Weakness (CWE)
- CWE-416: Use after free
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
References and research data (JSON)
Vendor product assessments
All currently supported Red Hat products · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
Red Hat · CVE-2026-84324 · Updated 2026-09-18T01:22:43+00:00
Known Affected Software Configurations
| Vendor | Product | Version range |
|---|---|---|
| Chrome | < 152.0.7977.75 |
All CVSS metrics
- CRITICAL 9 v3.1 · ADP Primary
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H - CRITICAL 9 v3.1 · NVD Secondary
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
References
Advisories
- https://chromereleases.googleblog.com/2026/09/stable-channel-update-for-desktop.html CVE record · Chrome · Updated 2026-09-01T23:42:26.522Z
NVD · CVE-2026-84324 · Updated 2026-09-03T17:12:44.213
Red Hat · CVE-2026-84324 · Updated 2026-09-18T01:22:43+00:00 - https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-84324.json Red Hat · CVE-2026-84324 · Updated 2026-09-18T01:22:43+00:00
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-69733 EUVD · EUVD-2026-69733
Technical & other
- https://issues.chromium.org/issues/533534913 CVE record · Chrome · Updated 2026-09-01T23:42:26.522Z
NVD · CVE-2026-84324 · Updated 2026-09-03T17:12:44.213
Red Hat · CVE-2026-84324 · Updated 2026-09-18T01:22:43+00:00 - https://access.redhat.com/security/cve/CVE-2026-84324 Red Hat · CVE-2026-84324 · Updated 2026-09-18T01:22:43+00:00
- https://www.cve.org/CVERecord?id=CVE-2026-84324 Red Hat · CVE-2026-84324 · Updated 2026-09-18T01:22:43+00:00
- https://nvd.nist.gov/vuln/detail/CVE-2026-84324 Red Hat · CVE-2026-84324 · Updated 2026-09-18T01:22:43+00:00
Sources: NVD · CVE.org · All sources and attribution · EPSS