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CVE-2021-48019

6.3 medium SSVC exploitation: none Deferred
NVD · CVE.org

Vyper before 0.2.9 deploys forwarder proxies through the built-in create_forwarder_to function that report a fixed 4096-byte RETURNDATASIZE rather than the actual return data size. Calls through these proxies can yield corrupted data when a function returns more than 4096 bytes without return data sanitation, and fail strict return-size checks such as SafeERC20.safeTransfer.

Fix

Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.

Change history 2

  1. StatusReceived → DeferredNVD modified 2026-10-22 17:00
  2. First seenCVSS 6.3NVD modified 2026-10-21 01:17

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 2