SB2026051412 - Debian update for thunderbird

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Main Vulnerability Database SB2026051412

SB2026051412 - Debian update for thunderbird

Published: May 14, 2026

Security Bulletin ID SB2026051412
CSH Severity
High
Patch available
YES
Number of vulnerabilities 4
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 50% Medium 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 4 vulnerabilities.


1) Out-of-bounds read (CVE-ID: CVE-2026-7320)

The vulnerability allows a remote attacker to disclose sensitive information.

The vulnerability exists due to incorrect boundary conditions in the Audio/Video component when processing media content. A remote attacker can cause the browser to process specially crafted media content to disclose sensitive information.


2) Input validation error (CVE-ID: CVE-2026-7321)

The vulnerability allows a remote attacker to escape the sandbox.

The vulnerability exists due to incorrect boundary conditions in the WebRTC: Networking component when handling WebRTC network traffic. A remote attacker can trigger specially crafted WebRTC network interactions to escape the sandbox.

User interaction is required to visit a specially crafted website or URL.


3) Buffer overflow (CVE-ID: CVE-2026-7322)

The vulnerability allows a remote attacker to execute arbitrary code.

The vulnerability exists due to memory corruption when processing crafted web content. A remote attacker can trigger memory safety bugs to execute arbitrary code.


4) Buffer overflow (CVE-ID: CVE-2026-7323)

The vulnerability allows a remote attacker to execute arbitrary code.

The vulnerability exists due to memory corruption when rendering web content. A remote attacker can trigger memory corruption using specially crafted web content to execute arbitrary code.


Remediation

Install update from vendor's website.

References