Reliance on Undefined Affecting deno package, versions <2.9.1-r1


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.11% (2nd percentile)

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  • Snyk IDSNYK-WOLFILATEST-DENO-17816170
  • published4 Jul 2026
  • disclosed17 Jul 2026

Introduced: 4 Jul 2026

NewCVE-2026-50185  (opens in a new tab)
CWE-758  (opens in a new tab)

How to fix?

Upgrade Wolfi deno to version 2.9.1-r1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream deno package and not the deno package as distributed by Wolfi. See How to fix? for Wolfi relevant fixed versions and status.

RustCrypto CMOV provides conditional move CPU intrinsics which are guaranteed on major platforms to execute in constant-time and not be rewritten as branches by the compiler. From 0.1.1 until 0.5.4, the aarch64 implementations of Cmov and CmovEq in cmov/src/backends/aarch64.rs assume high bits are zero-extended when loading values smaller than a register, so set high bits such as [8..] in a Cmov selector or [16..] of self or other in the u16 and i16 CmovEq implementations can cause left.cmovz(&right, condition) to produce incorrect output. This issue is fixed in version 0.5.4.