Integer Overflow or Wraparound Affecting bento package, versions <1.21.0-r0


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.55% (44th percentile)

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  • Snyk IDSNYK-WOLFILATEST-BENTO-19221602
  • published23 Aug 2026
  • disclosed29 May 2026

Introduced: 29 May 2026

CVE-2026-46384  (opens in a new tab)
CWE-190  (opens in a new tab)

How to fix?

Upgrade Wolfi bento to version 1.21.0-r0 or higher.

NVD Description

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

iskorotkov/avro is a fast Go Avro codec. Prior to 2.33.0, several Avro decoder paths read attacker-controlled 64-bit values from the wire format and either narrowed them to platform-sized int before bounds-checking, or summed them with overflow-prone signed-int arithmetic. On 32-bit targets (GOARCH=386, arm, mips, wasm, etc.), the truncation paths can silently bypass byte-slice limits, select the wrong union branch, or hit the OCF negative-make panic via wrap. Three sub-issues are not 32-bit-specific: cumulative-size arithmetic overflow in arrayDecoder.Decode / mapDecoder.Decode / mapDecoderUnmarshaler.Decode (wraps at math.MaxInt64 on amd64 / arm64 and bypasses MaxSliceAllocSize / MaxMapAllocSize), math.MinInt negation in block-header handling, and make([]byte, size) with a negative size in OCF block reads — all three panic or bypass caps on any platform, giving an attacker a denial-of-service primitive there. This vulnerability is fixed in 2.33.0.

CVSS Base Scores

version 3.1