How severe is CVE-2026-7339?

CVE-2026-7339 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-7339 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-7339?

CVE-2026-7339 affects Google Chrome. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-7339?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-7339 have an EU (EUVD) identifier?

Yes. CVE-2026-7339 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26165.

When was CVE-2026-7339 published?

CVE-2026-7339 was published on 2026-04-28 and last updated on 2026-06-17.

CVE-2026-7339

CVE-2026-7339 is a high-severity vulnerability in Google Chrome with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-122.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 0% (18th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-26165
Weakness: CWE-122
Affected product: Google Chrome
Published: 2026-04-28
Last modified: 2026-06-17

Description

Heap buffer overflow in WebRTC in Google Chrome prior to 147.0.7727.138 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: Medium)

Frequently asked questions

What is CVE-2026-7339?: Heap buffer overflow in WebRTC in Google Chrome prior to 147.0.7727.138 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: Medium)
How severe is CVE-2026-7339?: CVE-2026-7339 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-7339 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-7339?: CVE-2026-7339 affects Google Chrome. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-7339?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-7339 have an EU (EUVD) identifier?: Yes. CVE-2026-7339 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26165.
When was CVE-2026-7339 published?: CVE-2026-7339 was published on 2026-04-28 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*

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