# CVE-2026-124860: Use-after-free in the Audio/Video component

Status: published. Published: 2026-11-10. Updated: 2026-11-10.

Use-after-free in the Audio/Video component. This vulnerability was fixed in Firefox 160, Firefox ESR 115.45, and Firefox ESR 153.7.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Mozilla / Firefox: ≥ 115.45; ≤ 115.* (unaffected, rpm); ≥ 153.7; ≤ 153.* (unaffected, rpm); ≥ 160; ≤ * (unaffected, rpm). Source: CNA: mozilla

## Severity and prioritization

- CVSS 3.1: 8.8 (high); CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H; source: ADP: CISA-ADP

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: exploitation none; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-416

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://bugzilla.mozilla.org/show_bug.cgi?id=2074194 (CNA: mozilla)

- https://www.mozilla.org/security/advisories/mfsa2026-125/ (CNA: mozilla)

- https://www.mozilla.org/security/advisories/mfsa2026-126/ (CNA: mozilla)

- https://www.mozilla.org/security/advisories/mfsa2026-127/ (CNA: mozilla)

## Provenance

- CNA: mozilla: https://www.cve.org/CVERecord?id=CVE-2026-124860; retrieved 2026-11-10; source updated 2026-11-10

Revision: 8a9925b150f3fb1854e8efa05673a31415d179fa3d03aae2481d50c3437471e6

Canonical: https://y2.dev/cve/CVE-2026-124860

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