Upstream information

CVE-2026-0818 at MITRE

Description

When a user explicitly requested Thunderbird to decrypt an inline OpenPGP message that was embedded in a text section of an email that was formatted and styled with HTML and CSS, then the decrypted contents were rendered in a context in which the CSS styles from the outer messages were active. If the user had additionally allowed loading of the remote content referenced by the outer email message, and the email was crafted by the sender using a combination of CSS rules and fonts and animations, then it was possible to extract the secret contents of the email. This vulnerability affects Thunderbird < 147.0.1 and Thunderbird < 140.7.1.

SUSE information

Overall state of this security issue: Pending

This issue is currently rated as having moderate severity.

CVSS v3 Scores
CVSS detail CNA (CISA-ADP) SUSE
Base Score 4.3 3.1
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
Attack Vector Network Network
Attack Complexity Low High
Privileges Required None None
User Interaction Required Required
Scope Unchanged Unchanged
Confidentiality Impact Low Low
Integrity Impact None None
Availability Impact None None
CVSSv3 Version 3.1 3.1
CVSS v4 Scores
CVSS detail SUSE
Base Score 2.3
Vector CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Attack Vector Network
Attack Complexity High
Attack Requirements Present
Privileges Required None
User Interaction Passive
Vulnerable System Confidentiality Impact Low
Vulnerable System Integrity Impact None
Vulnerable System Availability Impact None
Subsequent System Confidentiality Impact None
Subsequent System Integrity Impact None
Subsequent System Availability Impact None
CVSSv4 Version 4.0
SUSE Bugzilla entry: 1257397 [NEW]

No SUSE Security Announcements cross referenced.

List of released packages

Product(s) Fixed package version(s) References
openSUSE Tumbleweed
  • MozillaThunderbird >= 140.7.1-1.1
  • MozillaThunderbird-openpgp-librnp >= 140.7.1-1.1
  • MozillaThunderbird-translations-common >= 140.7.1-1.1
  • MozillaThunderbird-translations-other >= 140.7.1-1.1
Patchnames:
openSUSE-Tumbleweed-2026-10128

List of packages in QA

Product(s) Package(s)
SUSE Linux Enterprise Module for Package Hub 15 SP7
  • MozillaThunderbird >= 140.7.1-150200.8.254.1
  • MozillaThunderbird-translations-common >= 140.7.1-150200.8.254.1
  • MozillaThunderbird-translations-other >= 140.7.1-150200.8.254.1
SUSE Linux Enterprise Workstation Extension 15 SP7
  • MozillaThunderbird >= 140.7.1-150200.8.254.1
  • MozillaThunderbird-translations-common >= 140.7.1-150200.8.254.1
  • MozillaThunderbird-translations-other >= 140.7.1-150200.8.254.1
SUSE Linux Enterprise Server 15 SP7
  • MozillaThunderbird >= 140.7.1-150200.8.254.1
  • MozillaThunderbird-translations-common >= 140.7.1-150200.8.254.1
  • MozillaThunderbird-translations-other >= 140.7.1-150200.8.254.1
SUSE Linux Enterprise Server for SAP Applications 15 SP7
  • MozillaThunderbird >= 140.7.1-150200.8.254.1
  • MozillaThunderbird-translations-common >= 140.7.1-150200.8.254.1
  • MozillaThunderbird-translations-other >= 140.7.1-150200.8.254.1
SUSE Linux Enterprise Desktop 15 SP7
  • MozillaThunderbird >= 140.7.1-150200.8.254.1
  • MozillaThunderbird-translations-common >= 140.7.1-150200.8.254.1
  • MozillaThunderbird-translations-other >= 140.7.1-150200.8.254.1


Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.

Product(s) Source package State
Products under general support and receiving all security fixes.
SUSE Linux Enterprise Desktop 15 SP7 MozillaThunderbird In progress
SUSE Linux Enterprise Module for Package Hub 15 SP5 MozillaThunderbird Affected
SUSE Linux Enterprise Module for Package Hub 15 SP6 MozillaThunderbird Affected
SUSE Linux Enterprise Module for Package Hub 15 SP7 MozillaThunderbird In progress
SUSE Linux Enterprise Server 15 SP7 MozillaThunderbird In progress
SUSE Linux Enterprise Server for SAP Applications 15 SP7 MozillaThunderbird In progress
SUSE Linux Enterprise Workstation Extension 15 SP7 MozillaThunderbird In progress
openSUSE Leap 15.6 MozillaThunderbird Affected
Products under Long Term Service Pack support and receiving important and critical security fixes.
SUSE Linux Enterprise Server 15 SP4 MozillaThunderbird Affected
SUSE Linux Enterprise Server 15 SP5 MozillaThunderbird Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP6 MozillaThunderbird Affected
Products past their end of life and not receiving proactive updates anymore.
SUSE Linux Enterprise Desktop 15 SP2 MozillaThunderbird Affected
SUSE Linux Enterprise Desktop 15 SP3 MozillaThunderbird Affected
SUSE Linux Enterprise Desktop 15 SP4 MozillaThunderbird Affected
SUSE Linux Enterprise Desktop 15 SP5 MozillaThunderbird Affected
SUSE Linux Enterprise Desktop 15 SP6 MozillaThunderbird Affected
SUSE Linux Enterprise Module for Package Hub 15 SP3 MozillaThunderbird Affected
SUSE Linux Enterprise Module for Package Hub 15 SP4 MozillaThunderbird Affected
SUSE Linux Enterprise Server 15 SP2 MozillaThunderbird Affected
SUSE Linux Enterprise Server 15 SP3 MozillaThunderbird Affected
SUSE Linux Enterprise Server 15 SP6 MozillaThunderbird Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP2 MozillaThunderbird Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP3 MozillaThunderbird Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP4 MozillaThunderbird Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP5 MozillaThunderbird Affected
SUSE Linux Enterprise Workstation Extension 15 SP2 MozillaThunderbird Affected
SUSE Linux Enterprise Workstation Extension 15 SP3 MozillaThunderbird Affected
SUSE Linux Enterprise Workstation Extension 15 SP4 MozillaThunderbird Affected
SUSE Linux Enterprise Workstation Extension 15 SP5 MozillaThunderbird Affected
SUSE Linux Enterprise Workstation Extension 15 SP6 MozillaThunderbird Affected
openSUSE Leap 15.3 MozillaThunderbird Affected
openSUSE Leap 15.4 MozillaThunderbird Affected
openSUSE Leap 15.5 MozillaThunderbird Affected


SUSE Timeline for this CVE

CVE page created: Wed Jan 28 10:03:03 2026
CVE page last modified: Mon Feb 2 12:47:14 2026