CVE-2023-46332Public exploit

Interpreter crash via missing data-section validation

Published Oct 23, 2023 · Updated Sep 17, 2024

Out-of-bounds write in wasm-interp in WebAssembly WABT 1.0.33 allows local users to crash the tool via a crafted WebAssembly module. DataSegment::Drop() writes through an absent data-segment entry when a malformed module declares a nonzero data count but omits the data section. Execution requires a user to open the crafted module with wasm-interp; the demonstrated consequence is a segmentation fault, not code execution.

CVSS severity5.5
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in wasm-interp in WebAssembly WABT 1.0.33 allows local users to crash the tool via a crafted WebAssembly module. DataSegment::Drop() writes through an absent data-segment entry when a malformed module declares a nonzero data count but omits the data section. Execution requires a user to open the crafted module with wasm-interp; the demonstrated consequence is a segmentation fault, not code execution.

The record

CVE
CVE-2023-46332
Published
Oct 23, 2023
Updated
Sep 17, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 23, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1204.002Malicious File

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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