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Review reviewHigh

CVE-2026-8945

Mozilla Firefox, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6

Sandbox escape in Firefox and Firefox Focus for Android. This vulnerability was fixed in Firefox 151.

CVSS
7.5
EPSS
0.37%
29.1% percentile
CISA KEV
Not listed
Published
2026.05.19
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.37%
Technical severityCVSS 7.5

Vulnerability overview

Sandbox escape in Firefox and Firefox Focus for Android. This vulnerability was fixed in Firefox 151.

Affected product and versions

Product
Mozilla Firefox, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6
Affected versions
< 151.0.0, < 151.0
Fixed versions
151.0.0, 151.0

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Mozilla Firefox, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6 and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
CWE-653, CWE-693
CVE-2026-8945 — Mozilla Firefox, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6 | SECUFOCUS NOW