Firefox vulnerability

Privilege escalation in the Places component. This vulnerability was fixed in Firefox ESR 153.4 and Firefox 157.

Published 29 Sep 2026Updated 30 Sep 20263 sources
CVSS 8.8

What happened

Privilege escalation in the Places component. This vulnerability was fixed in Firefox ESR 153.4 and Firefox 157.

Affected versions

Firefox: See vendor advisory Fixed: See vendor advisory.

Why it matters

Review the vendor advisory and exposure of the affected product to determine operational impact.

Detection & mitigation

  • Apply vendor-provided updates or mitigations.
  • Review affected product exposure and access logs.

Public PoC references

No public PoC reference has passed the current publication threshold.