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CVE-2026-12292 Mozilla CVE debrief

CVE-2026-12292 is a vulnerability caused by incorrect boundary conditions in the Web Audio component. It was published on [cvePublishedAt](https://www.cve.org/CVERecord?id=CVE-2026-12292) and modified on [cveModifiedAt]. The vulnerability was fixed in Firefox 152 and Firefox ESR 140.12. For more information, refer to [ref-5](https://www.mozilla.org/security/advisories/mfsa2026-57/) and [ref-6](https://www.mozilla.org/security/advisories/mfsa2026-58/).

Vendor
Mozilla
Product
Firefox
CVSS
HIGH 8.1
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 and Firefox ESR should update to version 152 and 140.12 respectively to patch this vulnerability.

Technical summary

The Web Audio component has a vulnerability due to incorrect boundary conditions. This could potentially allow an attacker to execute arbitrary code or cause a denial of service.

Defensive priority

High

Recommended defensive actions

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

Evidence notes

The CVE was published by the CVE Numbering Authority and details were obtained from the National Vulnerability Database and Mozilla's security advisories.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-12292 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-12292

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

  • CVE-2026-12292 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-12292

    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.