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PatchSiren cyber security CVE debrief

CVE-2026-12295 Mozilla CVE debrief

CVE-2026-12295 is a vulnerability in the DOM: Navigation component that allows for sandbox escape. This issue was addressed by Mozilla in Firefox 152, Firefox ESR 140.12, and Firefox ESR 115.37.

Vendor
Mozilla
Product
Firefox
CVSS
CRITICAL 9.6
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-16
Original CVE updated
2026-07-15
Advisory published
2026-06-16
Advisory updated
2026-07-15

Who should care

Users of Firefox, Firefox ESR, and other Mozilla products are potentially impacted by this vulnerability.

Technical summary

The vulnerability is a sandbox escape issue in the DOM: Navigation component. The CVSS score and severity are not provided in the given data.

Defensive priority

High

Recommended defensive actions

  • Update Firefox to version 152 or later
  • Update Firefox ESR to version 140.12 or later
  • Update Firefox ESR to version 115.37 or later

Evidence notes

The vendor is identified as Mozilla based on evidence from the source item.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-12295 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-12295

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-12295 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-12295

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.