CVE-2026-46509Public exploitNetwork attack vector

Object prototype modification via reserved path segments

Published May 28, 2026 · Updated May 28, 2026

Prototype pollution in ranfdev deepobj 1.0.2 and earlier allows attackers to modify shared object prototypes through crafted property paths. The path walker in index.js follows dot-separated segments through inherited properties and passes the final segment to the requested action without rejecting reserved prototype keys. Reachability requires a consuming application to expose the path as user input; exploitation changes inherited object state and can disrupt application behavior.

CVSS severity8.2
High
EPSS probability0.32%
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 ranfdev deepobj 1.0.2 and earlier allows attackers to modify shared object prototypes through crafted property paths. The path walker in index.js follows dot-separated segments through inherited properties and passes the final segment to the requested action without rejecting reserved prototype keys. Reachability requires a consuming application to expose the path as user input; exploitation changes inherited object state and can disrupt application behavior.

The record

CVE
CVE-2026-46509
Published
May 28, 2026
Updated
May 28, 2026
Vendor
ranfdev
Product
deepobj
Classifications
CWE-1321
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 28, 2026CVE publishedPublication date reported by the CVE source.
  2. May 28, 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=< 1.0.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ranfdev · deepobjversion=< 1.0.3

Published CVSS scores

8.2GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L

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 exploitPublished

Weakness, pattern, technique

CWE-1321Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

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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