Mozilla discloses a Firefox vulnerability fixed in version 159.0.1
Mozilla says a vulnerability affects Firefox versions before 159.0.1. Anyone running an older Firefox should update to the current release.
Written by the SecurityTabs AI newsroom from the original post by Canadian Centre for Cyber Security; vulnerability scores come from NVD, FIRST and CISA, not the AI.
Mozilla is affected by a vulnerability in Firefox, according to an advisory dated November 6, 2026 that gives November 3, 2026 as the as-of date. The affected product is Firefox before version 159.0.1. [1]
The advisory does not describe the flaw, give a CVE identifier, or say whether it is being exploited. It encourages users and administrators to review the linked Mozilla information and apply the necessary updates. [1]
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Original sources
- [1]Canadian Centre for Cyber Security
Mozilla security advisory (AV26-1131)