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CVE-2026-46695 is a critical sandbox-escape / permission-bypass vulnerability in Boxlite prior to version 0.9.0. Boxlite mounts host directories shared via virtiofs as guest-side read-only by relying on the guest mount flag MS_RDONLY, but affected versions also exposed CAP_SYS_ADMIN in the default guest capability set. As a result, untrusted code running inside a Boxlite sandbox could remount an intended read-only shared directory as read-write, for example via a remount operation equivalent to mount -o remount,rw <path>, and then write through to the underlying host filesystem. This breaks Boxlite’s advertised read-only isolation guarantees for shared directories and allows arbitrary write operations against paths that should have remained read-only. The issue was fixed in 0.9.0 by enforcing read-only at the hypervisor level via krun_add_virtiofs3 and by dropping CAP_SYS_ADMIN from the default guest capability set.
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krun_add_virtiofs3 rather than relying solely on guest-side MS_RDONLY, and removes CAP_SYS_ADMIN from the default guest capability set. The release notes state that affected versions earlier than 0.9.0 should be upgraded and that there is no workaround.No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
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9 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A privilege/control bypass issue in Boxlite prior to version 0.9.0 where unrestricted kernel capabilities inside containers allow malicious code to remount directories as read-write and perform arbitrary writes on directories intended to be read-only.
A critical sandbox-escape and privilege-escalation vulnerability in boxlite where untrusted code inside a sandbox could remount a virtiofs shared host directory as read-write and modify the host filesystem, breaking the product's read-only isolation guarantees.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.