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CVE-2026-81523 is an improper input-validation vulnerability in MongoDB libmongocrypt automatic-encryption context setup. Vulnerable versions accept caller-controlled database and collection name arguments containing period or NUL characters without validation. These malformed identifiers can result in incorrect schema selection during automatic encryption operations. libmongocrypt 1.20.3 introduced validation rejecting such arguments.
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A vulnerability in libmongocrypt affecting Fedora 45; the content provides CVSS v2 and v3 scoring but does not describe the underlying flaw.
A libmongocrypt vulnerability fixed in version 1.20.3 by validating database and collection-name arguments against period and NUL-byte characters.
A libmongocrypt input-validation vulnerability affecting database and collection name arguments containing period characters or NUL bytes, fixed in version 1.20.3.
A libmongocrypt vulnerability addressed in version 1.20.3 by validating database and collection-name arguments to reject period and NUL-byte values.
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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.
Community discussion across Reddit, Mastodon, and other social sources.