CVE-2021-46053Public exploit

Local wasm-ctor-eval termination via crafted input

Published Jan 7, 2022 · Updated Aug 4, 2024

Denial of service in WebAssembly Binaryen 103 allows local users to terminate wasm-ctor-eval with SIGKILL using a crafted input file. The upstream report identifies the affected tool and POC5 input, but it provides no stack trace or function-level explanation of the operation that triggers the kill. Reproduction requires local execution of wasm-ctor-eval against the crafted file, and the demonstrated consequence is termination of that process.

CVSS severity5.5
Medium
EPSS probability0.70%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in WebAssembly Binaryen 103 allows local users to terminate wasm-ctor-eval with SIGKILL using a crafted input file. The upstream report identifies the affected tool and POC5 input, but it provides no stack trace or function-level explanation of the operation that triggers the kill. Reproduction requires local execution of wasm-ctor-eval against the crafted file, and the demonstrated consequence is termination of that process.

The record

CVE
CVE-2021-46053
Published
Jan 7, 2022
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-119, T1499
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 7, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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

5.5GitLab Advisory DatabaseCVSS: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-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1499Endpoint Denial of Service

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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