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OpenAdvisories
High DLA-4191-1 7 CVEs

firefox-esr - security update

Published May 29, 2025 · Updated Mar 9, 2026

Fixed packages 1

ReleasePackageFixed in
Debian · 11 firefox-esr 128.11.0esr-1~deb11u1

Vulnerabilities 7

  • High 8.1

    Memory safety bugs fixed in Firefox 139, Thunderbird 139, Firefox ESR 128.11, and Thunderbird 128.11

    Memory safety bugs present in Firefox 138, Thunderbird 138, Firefox ESR 128.10, and Thunderbird 128.10. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary cod…

  • High 8.1

    Memory safety bug fixed in Firefox ESR 128.11 and Thunderbird 128.11

    Memory safety bug present in Firefox ESR 128.10, and Thunderbird 128.10. This bug showed evidence of memory corruption and we presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox ESR 128…

  • Medium 5.4

    Clickjacking vulnerability could have led to leaking saved payment card details

    A clickjacking vulnerability could have been used to trick a user into leaking saved payment card details to a malicious page. This vulnerability was fixed in Firefox 139, Firefox ESR 128.11, Thunderbird 139, and Thunderbird 128.11.

  • Medium 5.4

    Use after free in libvpx in Google Chrome prior to 137.0.7151.55 allowed a remote attacker to potentially exploit heap …

  • Medium 4.8

    Potential local code execution in “Copy as cURL” command

    Due to insufficient escaping of the newline character in the “Copy as cURL” feature, an attacker could trick a user into using this command, potentially leading to local code execution on the user's system. This vulnerability was fixed in Firefox 139, Firefox…

  • Medium 4.3

    Error handling for script execution was incorrectly isolated from web content

    Error handling for script execution was incorrectly isolated from web content, which could have allowed cross-origin leak attacks. This vulnerability was fixed in Firefox 139, Firefox ESR 115.24, Firefox ESR 128.11, Thunderbird 139, and Thunderbird 128.11.

  • Medium 4.3

    Script element events leaked cross-origin resource status

    Script elements loading cross-origin resources generated load and error events which leaked information enabling XS-Leaks attacks. This vulnerability was fixed in Firefox 139, Firefox ESR 128.11, Thunderbird 139, and Thunderbird 128.11.