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CVE-2026-81524 is a namespace-injection vulnerability in MongoDB C Driver (libmongoc) versions 1.0.0 through 2.5.0. The driver insufficiently validates database and collection name components containing period or NUL-byte characters when composing an operation's target namespace. Applications that incorporate untrusted input into these components can consequently direct database operations to unintended resources, including resources belonging to another tenant. Version 2.5.1 introduces validation for the affected name arguments.
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A vulnerability addressed by Fedora advisory FEDORA-2026-83792d666c affecting the mongo-c-driver package on Fedora 45; the content provides no technical flaw details.
A libmongoc input-validation vulnerability affecting database and collection names containing a period or NUL byte; fixed in version 2.5.1 and included in the 2.5.2 update.
An input-validation vulnerability in libmongoc database and collection name arguments involving period and NUL-byte values, fixed in version 2.5.1 and included in the 2.5.2 update.
An input-validation vulnerability affecting libmongoc database and collection name arguments, addressed by rejecting period and NUL-byte values in mongo-c-driver 2.5.1.
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Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
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