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CVE-2026-8391

Other issue in the JavaScript Engine component

Other issue in the JavaScript Engine component. This vulnerability was fixed in Firefox 150.0.3, Firefox ESR 115.36, Firefox ESR 140.11, and Thunderbird 140.11.

CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed
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CVE-2026-8946

Incorrect boundary conditions in the Audio/Video: Web Codecs component

Incorrect boundary conditions in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
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CVE-2026-32134

NanoMQ: NULL Pointer Dereference Crash in tcptran_pipe_peer During Session Restore

NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. In versions 0.24.10 and below, when NanoMQ handles high-concurrency reconnect traffic using a reconnect-collision payload, the broker can crash due to a NULL pointer dereference during MQTT session resumption for clean_start=0 clients. The transport's p_peer callback (tcptran_pipe_peer()) iterates cpipe->subinfol while copying session metadata from the cached old pipe to the new reconnecting pipe, without checking whether the pointer is NULL. Under a reconnect race, cpipe->subinfol can be freed and set to NULL before session restore invokes this function, resulting in a remote unauthenticated Denial-of-Service (process crash) condition. This issue has been fixed in version 0.24.11.

CVSS 3.1 · 5.9 Medium EPSS < 1% KEV · Not listed
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CVE-2026-23557

Xenstored DoS via XS_RESET_WATCHES command

Any guest can cause xenstored to crash by issuing a XS_RESET_WATCHES command within a transaction due to an assert() triggering. In case xenstored was built with NDEBUG #defined nothing bad will happen, as assert() is doing nothing in this case. Note that the default is not to define NDEBUG for xenstored builds even in release builds of Xen.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
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Xen
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Xen
CVE-2026-23558

grant table v2 race in status page mapping

The adjustments made for XSA-379 as well as those subsequently becoming XSA-387 still left a race window, when a HVM or PVH guest does a grant table version change from v2 to v1 in parallel with mapping the status page(s) via XENMEM_add_to_physmap. Some of the status pages may then be freed while mappings of them would still be inserted into the guest's secondary (P2M) page tables.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
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Xen
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Xen
CVE-2026-8953

Sandbox escape due to use-after-free in the Disability Access APIs component

Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.

CVSS 3.1 · 9.6 Critical EPSS < 1% KEV · Not listed
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CVE-2022-41104

Microsoft Excel Security Feature Bypass Vulnerability

Microsoft Excel Security Feature Bypass Vulnerability

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
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365 Apps Excel Office and 1 more
CVE-2026-42832

Microsoft Office Spoofing Vulnerability

Improper access control in Microsoft Office allows an unauthorized attacker to perform spoofing locally.

CVSS 3.1 · 7.7 High EPSS < 1% KEV · Not listed
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CVE-2022-21840

Microsoft Office Remote Code Execution Vulnerability

Microsoft Office Remote Code Execution Vulnerability

CVSS 3.1 · 8.8 High EPSS 3.3% KEV · Not listed
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365 Apps Excel Office and 7 more