These pages are published after PatchSiren validates generated defensive summaries against stored public CVE and source evidence.
A vulnerability in Thunderbird's IMAP response parser can be triggered by a malicious or compromised IMAP server, causing the application to crash. This issue is reachable before authentication and was fixed in Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3. The vulnerability can cause denial-of-service due to application crashes. Defenders should prioritize verifying exposure and applying pat [truncated]
A vulnerability in Thunderbird could allow an attacker to perform an out-of-bounds buffer read via a maliciously constructed IMAP line. This issue was addressed in Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3. The vulnerability affects the IMAP protocol handling in Thunderbird, potentially allowing attackers to read sensitive information from memory. Defenders should assess their exposure an [truncated]
A maliciously constructed mail header could lead to multiple fields being parsed as one, or potential memory safety violations in Thunderbird. This vulnerability was fixed in Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3. The issue arises from improper parsing of email headers, which can cause Thunderbird to misinterpret or mishandle email content, potentially leading to memory safety violati [truncated]
A critical vulnerability was found in the Widget: Win32 component, which could allow mitigation bypass. This issue was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3. The vulnerability has a high CVSS score of 9.1, indicating a critical severity level. Defenders should prioritize verifying exposure in their Firefox, Firefox ESR, and Thunderbird deployments and applying the [truncated]
A denial-of-service vulnerability exists in the Security component of Firefox, Firefox ESR, and Thunderbird. The vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3. This issue is limited to denial-of-service attacks with no evidence of exploitation or data theft. Defenders should verify exposure and apply patches to prevent potential attacks. Additional infor [truncated]
A denial-of-service vulnerability exists in the SVG component of Firefox, Firefox ESR, and Thunderbird. The vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3. This issue is particularly relevant for defenders handling SVG content from untrusted sources, as it could potentially lead to service disruptions. The vulnerability has a CVSS score of 6.5, indicating [truncated]
A critical vulnerability was found in the Networking component of Firefox, which could allow for a mitigation bypass. This issue was addressed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3. The vulnerability impacts Firefox and Thunderbird deployments, particularly in environments utilizing the Networking component. Defenders should assess exposure and verify versions in use, p [truncated]
A mitigation bypass vulnerability exists in the Popup Blocker component of Firefox, Firefox ESR, and Thunderbird. The vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3. This issue impacts organizations using these products, as an attacker could potentially bypass existing mitigations, leading to further compromise. Defenders should assess the exposure of the [truncated]
Mozilla's Firefox and Thunderbird products have a vulnerability in the Safe Browsing component due to incorrect boundary conditions. This issue was addressed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3. The vulnerability could lead to security issues if exploited, emphasizing the need for prompt patching. Defenders should assess exposure and apply patches to mitigate potentia [truncated]
A sandbox escape vulnerability due to incorrect boundary conditions in the Widget: Win32 component was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3. The vulnerability has a CVSS score of 9.6 and is considered CRITICAL. This issue allows attackers to escape the sandbox, potentially leading to arbitrary code execution. Defenders should prioritize patching and verifying exp [truncated]
The CVE-2026-92070 vulnerability is an information disclosure issue in the Networking component of Firefox, which was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3. This vulnerability has a CVSS score of 4.3 and a severity of MEDIUM. The issue requires verification of patch status and potential exposure assessment for defenders managing and securing Firefox, Firefox ESR, [truncated]
A spoofing issue in the DOM: Navigation component was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3. The vulnerability has a CVSS score of 5.4 and is classified as MEDIUM severity. This issue could allow attackers to potentially spoof content, which could lead to user confusion or further malicious activity. Defenders should assess exposure and prioritize patching to prev [truncated]
A site isolation issue was found in the Reader Mode component of Firefox, Firefox ESR, Thunderbird, and Thunderbird ESR. This issue was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3. The vulnerability could potentially allow for site isolation bypasses, which may enable unauthorized access to sensitive data. Defenders should assess exposure and prioritize patching to prev [truncated]
A use-after-free vulnerability in the Widget: Gtk component of Firefox, Firefox ESR, Thunderbird, and Thunderbird has been addressed. This issue was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3. The vulnerability is a high-severity issue that could potentially be exploited by attackers. Defenders should prioritize verifying and applying patches to prevent potential explo [truncated]
A sandbox escape vulnerability was found in the Profile Backup component of Firefox and Thunderbird. The vulnerability was fixed in Firefox 156 and Thunderbird 156. Defenders responsible for managing Firefox and Thunderbird deployments, especially in environments where the Profile Backup component is used, should assess exposure and apply patches. This vulnerability could potentially allow an attacker to [truncated]
A sandbox escape vulnerability due to incorrect boundary conditions in the Widget: Win32 component was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3. This HIGH severity vulnerability has a CVSS score of 8.8. The vulnerability was addressed through security advisories (MFSA 2026-90, MFSA 2026-93, MFSA 2026-94, MFSA 2026-96) provided by Mozilla. Defenders should review thes [truncated]
A sandbox escape vulnerability due to incorrect boundary conditions in the Widget: Win32 component was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3. Defenders should assess exposure, prioritize remediation, and verify fixes. This vulnerability was addressed through security updates in these versions, emphasizing the importance of keeping software up-to-date to mitigate p [truncated]
A denial-of-service vulnerability exists in the Audio/Video component of an unspecified product. The vulnerability was fixed in Firefox 156 and Thunderbird 156. Defenders should assess exposure, particularly those managing Firefox and Thunderbird deployments. This vulnerability could potentially impact the availability of services relying on these components. Further verification is required to determine [truncated]
Mozilla Firefox and Thunderbird users should assess exposure to CVE-2026-92061, a critical vulnerability in the Security: Process Sandboxing component. Defenders should verify if their deployments use affected versions and prioritize patching to prevent potential sandbox escapes. This vulnerability, fixed in Firefox 156 and Thunderbird 156, requires verification of remediation from official Mozilla source [truncated]
A use-after-free vulnerability in the Internationalization component of Firefox, Firefox ESR, Thunderbird, and Thunderbird ESR has been addressed. This vulnerability, CVE-2026-92060, was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3. The issue involves a use-after-free condition that could potentially lead to code execution. Defenders should assess exposure and apply patc [truncated]
Mozilla products have a critical vulnerability in the DOM: Editor component. This CVE was published on 2026-09-15T13:17:00.350Z and was last modified on 2026-09-21T18:17:14.113Z. The NVD entry is currently Awaiting Analysis. Defenders should verify exposure, assess if software versions are vulnerable, and apply patches if necessary. The vulnerability is due to incorrect boundary conditions in the DOM: Edi [truncated]
A use-after-free vulnerability in the Graphics component of Firefox, Firefox ESR, Thunderbird, and Thunderbird 153.3 was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3. This CVE record was published on 2026-09-15T13:17:00.207Z and was last modified on 2026-09-20T01:16:36.777Z. The vulnerability allows attackers to potentially exploit the system, leading to possible securit [truncated]
A critical vulnerability, CVE-2026-92057, was found in the Enterprise Policies component of Mozilla products. This mitigation bypass issue was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3. The vulnerability has a CVSS score of 9.1 and is considered critical. Defenders responsible for Mozilla product deployments, particularly those using Enterprise Policies, should assess [truncated]
A use-after-free vulnerability in the Graphics: Text component of Firefox, Firefox ESR, Thunderbird, and Thunderbird 153.3 was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3. This CVE record was published on 2026-09-15T13:16:59.947Z and has been modified on 2026-09-20T01:16:36.603Z. The vulnerability allows for potential code execution on vulnerable systems, emphasizing th [truncated]
A spoofing issue due to an invalid pointer in the Graphics component of Firefox and Thunderbird was reported. The vulnerability was fixed in Firefox 156 and Thunderbird 156. Defenders should assess exposure, particularly for systems using these applications. This issue requires verification of affected systems and application of patches or mitigations. The CVE record and NVD entry provide details on the v [truncated]
A critical vulnerability was found in the XPConnect component of Firefox and Thunderbird, allowing for a sandbox escape due to a race condition. This issue was fixed in Firefox 156 and Thunderbird 156. The vulnerability's impact requires verification from official sources, and its exploitation is not confirmed. Defenders should prioritize verifying exposure, especially in environments utilizing XPConnect, [truncated]
A use-after-free vulnerability in the Widget: Win32 component of Firefox, Firefox ESR, Thunderbird, and Thunderbird 153.3 was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3. This CVE record was published on 2026-09-15T13:16:56.607Z and has not been modified since then. The NVD entry is currently Awaiting Analysis. The vulnerability affects the Widget: Win32 component, whic [truncated]
A critical vulnerability was found in the Widget: Win32 component, allowing for a sandbox escape due to incorrect boundary conditions. This issue was addressed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3. The vulnerability has a CVSS score of 9 and is considered critical. Defenders should prioritize verifying exposure in their Firefox and Thunderbird deployments, especially i [truncated]
A use-after-free vulnerability in the Graphics component of Firefox, Firefox ESR, Thunderbird, and Thunderbird 153.3 was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3. This CVE record was published on 2026-09-15T13:16:56.243Z and was last modified on 2026-09-20T01:16:36.263Z. The vulnerability has a CVSS score of 8.8 and is classified as HIGH severity. Defenders should pr [truncated]
A sandbox escape vulnerability due to incorrect boundary conditions in the WebRTC component of Firefox, Firefox ESR, Thunderbird, and Thunderbird ESR was publicly disclosed. The vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3. This critical vulnerability allows for potential sandbox escapes, enabling attackers to execute arbitrary code. Defenders should as [truncated]
