CVE-2024-21522Public exploitNetwork attack vector

Process crash via negative decoder frame size

Published Jul 10, 2024 · Updated Jul 10, 2026

Improper array-index validation in almoghamdani Audify.js allows remote attackers to crash a consuming Node.js process via a negative frameSize. OpusDecoderWrap::decode and decodeFloat convert frameSize to an integer and use it in native output-array allocation without rejecting negative values. Exploitation requires a consuming application to pass attacker-controlled frameSize data into either decoder API; successful calls abort only that hosting process.

CVSS severity7.5
High
EPSS probability0.62%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper array-index validation in almoghamdani Audify.js allows remote attackers to crash a consuming Node.js process via a negative frameSize. OpusDecoderWrap::decode and decodeFloat convert frameSize to an integer and use it in native output-array allocation without rejecting negative values. Exploitation requires a consuming application to pass attacker-controlled frameSize data into either decoder API; successful calls abort only that hosting process.

The record

CVE
CVE-2024-21522
Published
Jul 10, 2024
Updated
Jul 10, 2026
Vendor
almoghamdani
Product
Audify.js
Classifications
CWE-129, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 10, 2024CVE publishedPublication date reported by the CVE source.
  2. Jul 10, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <*

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

almoghamdani · Audify.jsversion=0 <*

Published CVSS scores

8.7GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.5SnykCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-129Improper Validation of Array Index
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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