Mozilla Thunderbird up to 150.0.0 memory corruption

Summaryinfo

A vulnerability was found in Mozilla Thunderbird up to 150.0.0. It has been classified as critical. Affected by this issue is some unknown functionality. The manipulation leads to memory corruption. This vulnerability is uniquely identified as CVE-2026-7324. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Mozilla Thunderbird up to 150.0.0 and classified as critical. This issue affects an unknown code block. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Memory safety bugs present in Thunderbird 150.0.0. 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 code. This vulnerability was fixed in Firefox 150.0.1 and Thunderbird 150.0.1.

It is possible to read the advisory at bugzilla.mozilla.org. The identification of this vulnerability is CVE-2026-7324 since 04/28/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 07/02/2026).

Upgrading to version 150.0.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-1296). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

• Debian Linux
• Red Hat Enterprise Linux
• SUSE Linux
• IGEL OS
• SUSE openSUSE
• Mozilla Firefox
• Mozilla Firefox ESR
• Mozilla Thunderbird
• Amazon Linux 2
• RESF Rocky Linux
• Oracle Linux

Productinfo

Type

• Mail Client Software

Vendor

• Mozilla

Name

• Thunderbird

Version

• 150.0

License

• open-source

Website

• Vendor: https://www.mozilla.org/

CPE 2.3info

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CPE 2.2info

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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