Ref# ADV2026_45 | Date: Jan 31st 2026

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Mozilla published a security advisory highlighting vulnerabilities in the following product on January 27^th, 2026. It is recommended that you take the necessary precautions by ensuring your product is always updated.

• Firefox – versions prior to 147.0.2

For more information on these updates, you can follow these URLs:

• Mozilla Foundation Security Advisory 2026-06
• Mozilla Security Advisories

The Guyana National CIRT recommends that users and administrators review this update and apply it where necessary.

PDF Download: Mozilla Security Advisory

References

 

• Mozilla Foundation Security Advisory 2026-06. (n.b.). Retrieved from Mozilla. https://www.mozilla.org/en-US/security/advisories/mfsa2026-06/

 

• Mozilla Security Advisories. (n.b.). Retrieved from Mozilla. https://www.mozilla.org/en-US/security/advisories/

 

• Mozilla security advisory. (January 30, 2026). Retrieved from Canadian Centre for Cyber Security. https://www.cyber.gc.ca/en/alerts-advisories/mozilla-security-advisory-av26-071