MariaDB Connector/Node.js exposes uninitialized process memory through malformed GeoJSON parameters

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

MariaDB Connector/Node.js is used to connect applications developed on Node.js to MariaDB and MySQL databases. Prior to 3.2.5, 3.3.4, 3.4.7, and 3.5.4, the GeoJSON Polygon and MultiPolygon binary encoders size a Buffer.allocUnsafe() allocation from each ring's numeric length before confirming that the ring is an array. A malformed non-array ring can therefore reserve bytes that the writing loop skips, and the connector sends the full buffer through execute() or batch(), disclosing uninitialized Node.js heap data into a database value. The persisted data can include other users' content, session material, database credentials, or TLS key material and may propagate to backups and replicas. The text-protocol query() path is not affected. This issue is fixed in versions 3.2.5, 3.3.4, 3.4.7, and 3.5.4.

Source published

8 Oct 2026 18:27:02 UTC

Source modified

14 Oct 2026 01:11:23 UTC

Observed here

23 Oct 2026 15:48:27 UTC

Source terms

CVE Program Terms of Use

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CVSS 3.1 · 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

MariaDB Connector/Node.js is used to connect applications developed on Node.js to MariaDB and MySQL databases. Prior to 3.2.5, 3.3.4, 3.4.7, and 3.5.4, the GeoJSON Polygon and MultiPolygon binary encoders size a Buffer.allocUnsafe() allocation from each ring's numeric length before confirming that the ring is an array. A malformed non-array ring can therefore reserve bytes that the writing loop skips, and the connector sends the full buffer through execute() or batch(), disclosing uninitialized Node.js heap data into a database value. The persisted data can include other users' content, session material, database credentials, or TLS key material and may propagate to backups and replicas. The text-protocol query() path is not affected. This issue is fixed in versions 3.2.5, 3.3.4, 3.4.7, and 3.5.4.

Source published

Oct 8, 2026, 6:27:02 PM (timezone not stated)

Source modified

Oct 14, 2026, 1:11:23 AM (timezone not stated)

Observed here

9 Nov 2026 05:07:46 UTC

Source terms

ENISA EUVD · source terms and attribution apply

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EUVD CVSS 3.1 · 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

MariaDB Connector/Node.js is used to connect applications developed on Node.js to MariaDB and MySQL databases. Prior to 3.2.5, 3.3.4, 3.4.7, and 3.5.4, the GeoJSON Polygon and MultiPolygon binary encoders size a Buffer.allocUnsafe() allocation from each ring's numeric length before confirming that the ring is an array. A malformed non-array ring can therefore reserve bytes that the writing loop skips, and the connector sends the full buffer through execute() or batch(), disclosing uninitialized Node.js heap data into a database value. The persisted data can include other users' content, session material, database credentials, or TLS key material and may propagate to backups and replicas. The text-protocol query() path is not affected. This issue is fixed in versions 3.2.5, 3.3.4, 3.4.7, and 3.5.4.

Source published

8 Oct 2026 19:17:00 UTC

Source modified

14 Oct 2026 02:16:56 UTC

Observed here

25 Oct 2026 05:17:13 UTC

Source terms

NIST NVD usage terms; underlying source attribution retained

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CVSS 3.1 · [email protected] · Secondary · 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

### Description When encoding a GeoJSON Polygon or MultiPolygon parameter for the binary protocol, the connector sized its output buffer from the length property of each ring, then wrote each ring only if it was a real array. The two loops disagreed: any non-array ring carrying a numeric length (a string, or an object such as {"length": 4000}) still reserved 4 + 16 * length bytes, but wrote none of them. The buffer came from Buffer.allocUnsafe() and was returned in full regardless of how far the write position had advanced, so every reserved-but-unwritten byte was uninitialized Node.js heap. The sibling LineString case handled this correctly, aborting with null on the first malformed point, so no reserved byte could escape unwritten. The only gate on this path is value.type naming a GeoJSON type, so any object shaped like {"type": "Polygon", ...} reached the encoder. ### Impact An application that passes an attacker-influenced object as a parameter to execute() or batch() writes uninitialized process memory into the database, where it is readable by anyone who can read that row and persists into backups and replicas. Applications accepting GeoJSON for map or location features are the natural case, as the attacker controls coordinates directly. The disclosed memory is not scoped to the requesting user: in a shared Node.js process the heap may hold other users' request and response bodies, session tokens and cookies, database credentials and TLS key material. The leak is silent — the insert succeeds and the column simply holds more bytes than it should. No non-default connector option and no particular server configuration are required. query() is not affected: the text encoder builds geometry as strings rather than through Buffer.allocUnsafe(). ### Resolution Both the Polygon and MultiPolygon encoders now reject a non-array ring before reserving space for it, so no byte of the allocation can be left uninitialized by the writing loop, matching the existing LineString behaviour. ### Workarounds Validate that GeoJSON coordinates are properly nested arrays of numbers before passing the object as a parameter, or use query(), until upgraded.

Source published

8 Oct 2026 19:42:11 UTC

Source modified

16 Oct 2026 09:55:42 UTC

Observed here

24 Oct 2026 13:17:17 UTC

Source terms

GitHub Advisory Database · CC-BY-4.0

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CVSS_V3 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Publisher rating · HIGH