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CVE-2026-107297

msgpack5: Quadratic parsing in the streaming decoder PUBLISHED

Description (CNA)

msgpack5 is a msgpack v5 implementation for node.js and the browser. Prior to 6.1.0, the streaming decoder reparses an incomplete array or map from the beginning whenever another chunk arrives. A remote peer can split one valid MessagePack container across many small chunks, causing completed elements to be decoded repeatedly, producing quadratic CPU use and blocking the event loop. This issue is fixed in version 6.1.0.

Affected (CNA)

Vendor / productVersions
mcollina / msgpack5affected < 6.1.0

CWE

CWE-407

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.