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CVE-2026-25641 is a sandbox escape vulnerability in SandboxJS affecting versions 0.8.28 and earlier. The flaw arises from a mismatch between the property key validated by the sandbox and the key ultimately used for property access. SandboxJS performs a safety check using a key value during validation, but does not enforce that the same primitive string value is later used when the property is accessed. Because the key is only annotated as a string and not strictly enforced as one, an attacker can supply a crafted object whose coercion yields different string values at different moments. This creates a time-of-check to time-of-use condition in which a key can appear benign during validation and resolve to a dangerous property during access, enabling bypass of sandbox restrictions and access to prohibited prototype-related properties.
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What an attacker gets, and what they’ve been doing with it.
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No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
9 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
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.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.