vulnerability
Debian: CVE-2025-4087: firefox-esr, thunderbird -- security update
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 6 | (AV:N/AC:M/Au:N/C:P/I:P/A:N) | Apr 29, 2025 | May 2, 2025 | Apr 15, 2026 |
Severity
6
CVSS
(AV:N/AC:M/Au:N/C:P/I:P/A:N)
Published
Apr 29, 2025
Added
May 2, 2025
Modified
Apr 15, 2026
Description
A vulnerability was identified in Thunderbird where XPath parsing could trigger undefined behavior due to missing null checks during attribute access. This could lead to out-of-bounds read access and potentially, memory corruption. This vulnerability was fixed in Firefox 138, Firefox ESR 128.10, Thunderbird 138, and Thunderbird 128.10.
Solutions
debian-upgrade-firefox-esrdebian-upgrade-thunderbird
Rapid7 Labs
2026 Global Threat Landscape Report
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