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OpenAdvisories
High RHSA-2025:9155 7 CVEs

Red Hat Security Advisory: firefox security update

Published Jun 17, 2025 · Updated Jun 30, 2026

Ecosystem: Red Hat

Fixed packages 9

ReleasePackageFixed in
Red Hat · RHEL 8.6 AUS rhel_aus:8.6::appstream firefox 0:128.11.0-1.el8_6
Red Hat · RHEL 8.6 AUS rhel_aus:8.6::appstream firefox-debuginfo 0:128.11.0-1.el8_6
Red Hat · RHEL 8.6 AUS rhel_aus:8.6::appstream firefox-debugsource 0:128.11.0-1.el8_6
Red Hat · RHEL 8.6 E4S rhel_e4s:8.6::appstream firefox 0:128.11.0-1.el8_6
Red Hat · RHEL 8.6 E4S rhel_e4s:8.6::appstream firefox-debuginfo 0:128.11.0-1.el8_6
Red Hat · RHEL 8.6 E4S rhel_e4s:8.6::appstream firefox-debugsource 0:128.11.0-1.el8_6
Red Hat · RHEL 8.6 TUS rhel_tus:8.6::appstream firefox 0:128.11.0-1.el8_6
Red Hat · RHEL 8.6 TUS rhel_tus:8.6::appstream firefox-debuginfo 0:128.11.0-1.el8_6
Red Hat · RHEL 8.6 TUS rhel_tus:8.6::appstream firefox-debugsource 0:128.11.0-1.el8_6

Vulnerabilities 7

  • High 8.1
    CVE-2025-5268

    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…

    Mozilla Firefox Thunderbird thunderbird Browsers Debian Ubuntu Wolfi
  • High 8.1
    CVE-2025-5269

    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…

    Mozilla Firefox Thunderbird thunderbird Browsers Debian Ubuntu Wolfi
  • Medium 5.4
    CVE-2025-5267

    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.

    Mozilla Firefox Thunderbird thunderbird Browsers Debian Ubuntu Wolfi
  • Medium 5.4
    CVE-2025-5283

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

    Google Chrome chromium chromium Browsers Debian Ubuntu Alpine Wolfi
  • Medium 4.8
    CVE-2025-5264

    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…

    Mozilla Firefox Thunderbird thunderbird Browsers Debian Ubuntu Wolfi
  • Medium 4.3
    CVE-2025-5263

    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.

    Mozilla Firefox Thunderbird thunderbird Browsers Debian Ubuntu Wolfi
  • Medium 4.3
    CVE-2025-5266

    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.

    Mozilla Firefox Thunderbird thunderbird Browsers Debian Ubuntu Wolfi

References

  • article
    https://access.redhat.com/security/updates/classification/#important
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2368749
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2368750
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2368751
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2368752
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2368755
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2368756
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2368757
  • advisory
    https://security.access.redhat.com/data/csaf/v2/advisories/2025/rhsa-2025_9155.json
  • report
    https://access.redhat.com/security/cve/CVE-2025-5263
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2025-5263
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2025-5263
  • article
    https://www.mozilla.org/en-US/security/advisories/mfsa2025-44/#CVE-2025-5263
  • article
    https://www.mozilla.org/en-US/security/advisories/mfsa2025-46/#CVE-2025-5263
  • report
    https://access.redhat.com/security/cve/CVE-2025-5264
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2025-5264
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2025-5264
  • article
    https://www.mozilla.org/en-US/security/advisories/mfsa2025-44/#CVE-2025-5264
  • article
    https://www.mozilla.org/en-US/security/advisories/mfsa2025-46/#CVE-2025-5264
  • report
    https://access.redhat.com/security/cve/CVE-2025-5266
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2025-5266
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2025-5266
  • article
    https://www.mozilla.org/en-US/security/advisories/mfsa2025-44/#CVE-2025-5266
  • article
    https://www.mozilla.org/en-US/security/advisories/mfsa2025-46/#CVE-2025-5266
  • report
    https://access.redhat.com/security/cve/CVE-2025-5267
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2025-5267
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2025-5267
  • article
    https://www.mozilla.org/en-US/security/advisories/mfsa2025-44/#CVE-2025-5267
  • article
    https://www.mozilla.org/en-US/security/advisories/mfsa2025-46/#CVE-2025-5267
  • report
    https://access.redhat.com/security/cve/CVE-2025-5268
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2025-5268
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2025-5268
  • article
    https://www.mozilla.org/en-US/security/advisories/mfsa2025-44/#CVE-2025-5268
  • article
    https://www.mozilla.org/en-US/security/advisories/mfsa2025-46/#CVE-2025-5268
  • report
    https://access.redhat.com/security/cve/CVE-2025-5269
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2025-5269
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2025-5269
  • article
    https://www.mozilla.org/en-US/security/advisories/mfsa2025-44/#CVE-2025-5269
  • article
    https://www.mozilla.org/en-US/security/advisories/mfsa2025-46/#CVE-2025-5269