CVE-2023-48105Network attack vector

Remote denial of service via heap overflow

Published Nov 22, 2023 · Updated Jul 9, 2026

Heap overflow in Bytecode Alliance wasm-micro-runtime 1.2.3 allows remote attackers to cause denial of service via crafted WebAssembly bytecode. The wasm_loader_prepare_bytecode function in core/iwasm/interpreter/wasm_loader.c mishandles bytecode data and overruns heap storage. The unauthenticated network path can interrupt the runtime process, while no confidentiality or integrity impact is reported.

CVSS severity7.5
High
EPSS probability1.00%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap overflow in Bytecode Alliance wasm-micro-runtime 1.2.3 allows remote attackers to cause denial of service via crafted WebAssembly bytecode. The wasm_loader_prepare_bytecode function in core/iwasm/interpreter/wasm_loader.c mishandles bytecode data and overruns heap storage. The unauthenticated network path can interrupt the runtime process, while no confidentiality or integrity impact is reported.

The record

CVE
CVE-2023-48105
Published
Nov 22, 2023
Updated
Jul 9, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 22, 2023CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 2026Record 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 vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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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