Mozilla Firefox up to 150.0.0 memory corruption

Summaryinfo

A vulnerability, which was classified as critical, was found in Mozilla Firefox up to 150.0.0. This impacts an unknown function. Such manipulation leads to memory corruption. This vulnerability is traded as CVE-2026-7323. The attack may be launched remotely. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Mozilla Firefox up to 150.0.0. Affected by this issue is some unknown functionality. 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. CVE summarizes:

Memory safety bugs present in Thunderbird ESR 140.10.0 and 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, Firefox ESR 140.10.1, Thunderbird 150.0.1, and Thunderbird 140.10.1.

The advisory is shared for download at bugzilla.mozilla.org. This vulnerability is handled as CVE-2026-7323 since 04/28/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 07/02/2026).

The vulnerability scanner Nessus provides a plugin with the ID 310740 (Mozilla Firefox < 150.0.1), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 150.0.1 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (310740) and CERT Bund (WID-SEC-2026-1296). VulDB is the best source for vulnerability data and more expert information about this specific topic.

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

• Web Browser

Vendor

• Mozilla

Name

• Firefox

Version

• 150.0

License

• open-source

Website

• Vendor: https://www.mozilla.org/
• Product: https://www.mozilla.org/en-US/firefox/

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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