OESA-2026-3842

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Source
https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2026-3842
Import Source
https://repo.openeuler.org/security/data/osv/OESA-2026-3842.json
JSON Data
https://api.osv.dev/v1/vulns/OESA-2026-3842
Upstream
  • CVE-2026-84119
  • CVE-2026-84120
  • CVE-2026-84121
  • CVE-2026-84122
  • CVE-2026-84124
  • CVE-2026-84131
  • CVE-2026-84143
  • CVE-2026-84145
  • CVE-2026-84639
  • CVE-2026-84640
  • CVE-2026-84641
Published
2026-09-14T16:34:54Z
Modified
2026-09-13T16:45:47Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
thunderbird security update
Details

Mozilla Thunderbird is a standalone mail and newsgroup client.

Security Fix(es):

Sandbox escape due to use-after-free in the DOM: Navigation component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, and Firefox ESR 153.2.(CVE-2026-84119)

Use-after-free in the Audio/Video component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, and Firefox ESR 153.2.(CVE-2026-84120)

Sandbox escape due to use-after-free in the DOM: Security component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, and Firefox ESR 153.2.(CVE-2026-84121)

Use-after-free in the Audio/Video component. This vulnerability was fixed in Firefox 155, Firefox ESR 140.15, and Firefox ESR 153.2.(CVE-2026-84122)

Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 155, Firefox ESR 140.15, and Firefox ESR 153.2.(CVE-2026-84124)

Privilege escalation due to invalid pointer in the Graphics component of Mozilla Firefox. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, and Firefox ESR 153.2.(CVE-2026-84131)

Internally found bugs present in Firefox 154, Firefox ESR 153.1 and Firefox ESR 140.14. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 155, Firefox ESR 140.15, and Firefox ESR 153.2.(CVE-2026-84143)

Internally found bugs present in Firefox 154, Firefox ESR 153.1, Firefox ESR 140.14 and Firefox ESR 115.39. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, and Firefox ESR 153.2.(CVE-2026-84145)

Triggering an error condition in certain MIME bodies would cause uninitialized memory to be used. This vulnerability was fixed in Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.(CVE-2026-84639)

A maliciously constructed mail header could lead to a one byte read past the end of a buffer. This vulnerability was fixed in Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.(CVE-2026-84640)

A malicious IMAP server can trigger use-after-free and heap-memory disclosure by sending a crafted ID response. Heap contents can ultimately be persisted to prefs.js. This vulnerability was fixed in Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.(CVE-2026-84641)

Database specific 
{
    "severity": "Critical"
}
References

Affected packages

openEuler:24.03-LTS-SP4 / thunderbird

Package

Name
thunderbird
Purl
pkg:rpm/openEuler/thunderbird&distro=openEuler-24.03-LTS-SP4

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
140.15.0-1.oe2403sp4

Ecosystem specific 

{
    "aarch64": [
        "thunderbird-140.15.0-1.oe2403sp4.aarch64.rpm",
        "thunderbird-debuginfo-140.15.0-1.oe2403sp4.aarch64.rpm",
        "thunderbird-debugsource-140.15.0-1.oe2403sp4.aarch64.rpm",
        "thunderbird-librnp-rnp-140.15.0-1.oe2403sp4.aarch64.rpm",
        "thunderbird-wayland-140.15.0-1.oe2403sp4.aarch64.rpm"
    ],
    "src": [
        "thunderbird-140.15.0-1.oe2403sp4.src.rpm"
    ],
    "x86_64": [
        "thunderbird-140.15.0-1.oe2403sp4.x86_64.rpm",
        "thunderbird-debuginfo-140.15.0-1.oe2403sp4.x86_64.rpm",
        "thunderbird-debugsource-140.15.0-1.oe2403sp4.x86_64.rpm",
        "thunderbird-librnp-rnp-140.15.0-1.oe2403sp4.x86_64.rpm",
        "thunderbird-wayland-140.15.0-1.oe2403sp4.x86_64.rpm"
    ]
}

Database specific

source 
"https://repo.openeuler.org/security/data/osv/OESA-2026-3842.json"