How severe is CVE-2025-6556?

CVE-2025-6556 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2025-6556 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-6556?

CVE-2025-6556 affects Google Chrome. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-6556?

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

Does CVE-2025-6556 have an EU (EUVD) identifier?

Yes. CVE-2025-6556 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-19072.

When was CVE-2025-6556 published?

CVE-2025-6556 was published on 2025-06-24 and last updated on 2026-06-17.

CVE-2025-6556

CVE-2025-6556 is a medium-severity vulnerability in Google Chrome with a CVSS 3.x base score of 5.4. 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-288.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
EPSS exploit prediction: 0% (5th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-19072
Weakness: CWE-288
Affected product: Google Chrome
Published: 2025-06-24
Last modified: 2026-06-17

Description

Insufficient policy enforcement in Loader in Google Chrome prior to 138.0.7204.49 allowed a remote attacker to bypass content security policy via a crafted HTML page. (Chromium security severity: Low)

Frequently asked questions

What is CVE-2025-6556?: Insufficient policy enforcement in Loader in Google Chrome prior to 138.0.7204.49 allowed a remote attacker to bypass content security policy via a crafted HTML page. (Chromium security severity: Low)
How severe is CVE-2025-6556?: CVE-2025-6556 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2025-6556 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-6556?: CVE-2025-6556 affects Google Chrome. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-6556?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-6556 have an EU (EUVD) identifier?: Yes. CVE-2025-6556 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-19072.
When was CVE-2025-6556 published?: CVE-2025-6556 was published on 2025-06-24 and last updated on 2026-06-17.

References

Affected products (1)

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

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