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CVE-2026-114117

8.2 high SSVC exploitation: poc Deferred
NVD · CVE.org

Vyper 0.3.8 through 0.5.0b1 contains an optimizer miscompilation in which (msg.value | K) or (len(msg.data) | K), where K is any nonzero integer literal, is compiled to the constant 1 when used as a ternary expression branch under -O gas (the default) or -O codesize. Affected contracts use the wrong value in storage writes, arithmetic, indexes, return values, or events without warning or revert, which can record deposits incorrectly and lock funds.

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 5

  1. StatusPublished → DeferredNVD modified 2026-10-22 17:00
  2. StatusReceived → PublishedNVD modified 2026-10-21 20:12
  3. StatusPublished → ReceivedNVD modified 2026-10-21 21:17
  4. StatusReceived → PublishedNVD modified 2026-10-21 20:12
  5. First seenCVSS 8.2NVD modified 2026-10-21 01:17

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 3