ESB-2026.4064

=========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2026.4064 firefox-esr security update 23 April 2026 =========================================================================== AUSCERT Security Bulletin Summary --------------------------------- Product: firefox-esr Publisher: Debian Operating System: Debian GNU/Linux Resolution: Patch/Upgrade CVE Names: CVE-2026-6746 CVE-2026-6747 CVE-2026-6748 CVE-2026-6749 CVE-2026-6750 CVE-2026-6751 CVE-2026-6752 CVE-2026-6753 CVE-2026-6754 CVE-2026-6757 CVE-2026-6761 CVE-2026-6762 CVE-2026-6763 CVE-2026-6764 CVE-2026-6765 CVE-2026-6766 CVE-2026-6767 CVE-2026-6769 CVE-2026-6770 CVE-2026-6771 CVE-2026-6772 CVE-2026-6776 CVE-2026-6785 CVE-2026-6786 Original Bulletin: https://lists.debian.org/debian-security-announce/2026/msg00135.html Comment: CVSS (Max): None available when published EPSS (Max): None available when published - --------------------------BEGIN INCLUDED TEXT-------------------- - ------------------------------------------------------------------------- Debian Security Advisory DSA-6225-1 security@debian.org https://www.debian.org/security/ Moritz Muehlenhoff April 22, 2026 https://www.debian.org/security/faq - ------------------------------------------------------------------------- Package : firefox-esr CVE ID : CVE-2026-6746 CVE-2026-6747 CVE-2026-6748 CVE-2026-6749 CVE-2026-6750 CVE-2026-6751 CVE-2026-6752 CVE-2026-6753 CVE-2026-6754 CVE-2026-6757 CVE-2026-6761 CVE-2026-6762 CVE-2026-6763 CVE-2026-6764 CVE-2026-6765 CVE-2026-6766 CVE-2026-6767 CVE-2026-6769 CVE-2026-6770 CVE-2026-6771 CVE-2026-6772 CVE-2026-6776 CVE-2026-6785 CVE-2026-6786 Multiple security issues have been found in the Mozilla Firefox web browser, which could potentially result in the execution of arbitrary code, spoofing, information disclosure or privilege escalation. For the oldstable distribution (bookworm), these problems have been fixed in version 140.10.0esr-1~deb12u1. For the stable distribution (trixie), these problems have been fixed in version 140.10.0esr-1~deb13u1. We recommend that you upgrade your firefox-esr packages. For the detailed security status of firefox-esr please refer to its security tracker page at: https://security-tracker.debian.org/tracker/firefox-esr Further information about Debian Security Advisories, how to apply these updates to your system and frequently asked questions can be found at: https://www.debian.org/security/ Mailing list: debian-security-announce@lists.debian.org - --------------------------END INCLUDED TEXT---------------------- You have received this e-mail bulletin as a result of your organisation's registration with AUSCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AUSCERT's members. As AUSCERT did not write the document quoted above, AUSCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AUSCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://portal.auscert.org.au/bulletins/ =========================================================================== AUSCERT The University of Queensland, Brisbane QLD 4072 Australia e: auscert@auscert.org.au t: +61 (0)7 3365 4417 Allies in Cyber Security ===========================================================================