CVE-2026-2964Public exploitNetwork attack vector

Prototype pollution via unsafe recursive configuration merge

Published Feb 23, 2026 · Updated Feb 23, 2026

Prototype pollution in higuma WebAudioRecorder.js 0.1 and 0.1.1 allows remote authenticated users to alter inherited object properties. The extend function in lib/WebAudioRecorder.js recursively copies enumerable configuration keys without rejecting proto, allowing assignments to traverse the prototype chain. Reachability requires an embedding application to pass attacker-controlled configuration data; resulting confidentiality, integrity, and availability effects depend on available application gadgets.

CVSS severity5.0
Medium
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Prototype pollution in higuma WebAudioRecorder.js 0.1 and 0.1.1 allows remote authenticated users to alter inherited object properties. The extend function in lib/WebAudioRecorder.js recursively copies enumerable configuration keys without rejecting proto, allowing assignments to traverse the prototype chain. Reachability requires an embedding application to pass attacker-controlled configuration data; resulting confidentiality, integrity, and availability effects depend on available application gadgets.

The record

CVE
CVE-2026-2964
Published
Feb 23, 2026
Updated
Feb 23, 2026
Vendor
higuma
Product
WebAudioRecorder.js
Classifications
CWE-1321, CWE-94
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 23, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 23, 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=0.1
  2. Affected versionversion=0.1.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

higuma · WebAudioRecorder.jsversion=0.1; version=0.1.1

Published CVSS scores

1.3VulDBCVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
4.6VulDBAV:N/AC:H/Au:S/C:P/I:P/A:P
5.0VulDBCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-1321Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
CWE-94Improper Control of Generation of Code ('Code Injection')

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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