CVE-2025-2783: Google Chromium Mojo Sandbox Escape Vulnerability

Is it exploited?

Yes. CISA added it to the Known Exploited Vulnerabilities catalog on 27 Mar 2025, 1 day after the CVE record was published.

How likely is exploitation in the next 30 days?

9.2%

EPSS score, percentile 95.3 of all scored records

How severe?

8.3 High

CVSS v3.1 base score, from CISA's enrichment of the record

What should I do?

CISA deadline 17 Apr 2025. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

The CVE record links no vendor advisory, patch or mitigation.

Which versions are affected?

Affected

• from 134.0.6998.177 to before 134.0.6998.177

Versions by product

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

What to do

CISA due date for this action: 17 April 2025.

Advisories and patches

The CVE record links no vendor advisory, patch or mitigation.

Linked from CISA's catalog entry

• https://chromereleases.googleblog.com/2025/03/stable-channel-update-for-desktop_25.html
• https://nvd.nist.gov/vuln/detail/CVE-2025-2783

Affected products and versions

As listed in the CVE record.

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

About this vulnerability

Google Chromium Mojo on Windows contains a sandbox escape vulnerability caused by a logic error, which results from an incorrect handle being provided in unspecified circumstances. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.

Summary: CISA's KEV catalog, as of 28 Oct 2026.

• CISA added CVE-2025-2783 to its Known Exploited Vulnerabilities (KEV) catalog on 27 Mar 2025.
• CISA's ransomware flag for this entry is "Unknown": no evidence of ransomware use in the catalog, which is not proof of none.
• The due date CISA sets for the required action is 17 Apr 2025.
• The CVE record was published on 26 Mar 2025, 1 day before it was added to KEV.
• The CVE record carries a CVSS v3.1 base score of 8.3 (High), taken from CISA's enrichment of the record.
• FIRST's EPSS model puts the probability of exploitation in the next 30 days at 9.2% (percentile 95.3), as of 28 Oct 2026.
• CISA's SSVC assessment in the CVE record: exploitation active, automatable no, technical impact total.

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026. About the data.

Description

Incorrect handle provided in unspecified circumstances in Mojo in Google Chrome on Windows prior to 134.0.6998.177 allowed a remote attacker to perform a sandbox escape via a malicious file. (Chromium security severity: High)

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

Timeline

References

• chromereleases.googleblog.com
• issues.chromium.org

More exploited Google vulnerabilities

• CVE-2026-111497: Google Brotli Unchecked Return Value Vulnerability (added 27 Oct 2026)
• CVE-2026-58704: Google Pixel Improper Authorization Vulnerability (added 16 Sep 2026)
• CVE-2026-87491: Google Chromium V8 Out of Bounds Write Vulnerability (added 9 Sep 2026)
• CVE-2026-85046: Google Chromium V8 Type Confusion Vulnerability (added 4 Sep 2026)
• CVE-2026-11645: Google Chromium V8 Out-of-Bounds Read and Write Vulnerability (added 9 Jun 2026)
• CVE-2026-5281: Google Dawn Use-After-Free Vulnerability (added 1 Apr 2026)