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PatchSiren cyber security CVE debrief

CVE-2026-12293 Mozilla CVE debrief

CVE-2026-12293 is a use-after-free vulnerability in the Graphics: WebGPU component of Firefox. This issue was fixed in Firefox 152. The vulnerability was published on [cvePublishedAt] and has not been associated with a CVSS score or severity level.

Vendor
Mozilla
Product
Firefox
CVSS
CRITICAL 9.8
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, particularly those who handle sensitive data or require high security standards, should be aware of this vulnerability and ensure they are running Firefox 152 or later.

Technical summary

The vulnerability is a use-after-free issue in the Graphics: WebGPU component of Firefox. This type of vulnerability occurs when the program attempts to use memory after it has been freed, potentially leading to crashes or code execution.

Defensive priority

High

Recommended defensive actions

  • Update Firefox to version 152 or later.

Evidence notes

The CVE was published on [cvePublishedAt] and has been linked to Mozilla as the affected vendor.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-12293 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-12293

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

  • CVE-2026-12293 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-12293

    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.