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CVE-2026-81524 is an improper input-validation vulnerability in the MongoDB C Driver. Special elements in caller-supplied database or collection name components, including dot and NUL-byte characters, are not sanitized when the driver constructs an operation target namespace. Applications that incorporate untrusted input into these components can cause an operation to be sent to a database or collection other than the application intended. Reported affected versions are MongoDB C Driver 1.0.0 through 2.5.0.
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No public exploit code observed for this vulnerability.
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A MongoDB C Driver namespace-handling flaw that permits cross-tenant database retargeting when applications incorporate untrusted namespace text.
An unpatched vulnerability affecting the Debian mongo-c-driver package on supported Debian Linux versions. The provided information indicates low confidentiality and integrity impact, no availability impact, and requires low privileges for exploitation; the precise flaw type is not specified.
Query your assets running an affected version, and investigate the blast radius.
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.