How severe is CVE-2026-3939?

CVE-2026-3939 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2026-3939 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-3939?

CVE-2026-3939 affects Google Chrome. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-3939?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-3939 have an EU (EUVD) identifier?

Yes. CVE-2026-3939 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-11468.

When was CVE-2026-3939 published?

CVE-2026-3939 was published on 2026-03-11 and last updated on 2026-06-17.

CVE-2026-3939

CVE-2026-3939 is a medium-severity vulnerability in Google Chrome with a CVSS 3.x base score of 5.3. 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-284.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 0% (4th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-11468
Weakness: CWE-284
Affected product: Google Chrome
Published: 2026-03-11
Last modified: 2026-06-17

Description

Insufficient policy enforcement in PDF in Google Chrome prior to 146.0.7680.71 allowed a remote attacker to bypass navigation restrictions via a crafted PDF file. (Chromium security severity: Low)

Frequently asked questions

What is CVE-2026-3939?: Insufficient policy enforcement in PDF in Google Chrome prior to 146.0.7680.71 allowed a remote attacker to bypass navigation restrictions via a crafted PDF file. (Chromium security severity: Low)
How severe is CVE-2026-3939?: CVE-2026-3939 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2026-3939 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-3939?: CVE-2026-3939 affects Google Chrome. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-3939?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-3939 have an EU (EUVD) identifier?: Yes. CVE-2026-3939 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-11468.
When was CVE-2026-3939 published?: CVE-2026-3939 was published on 2026-03-11 and last updated on 2026-06-17.

References

Affected products (1)

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

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