CVE-2026-44483Public exploitNetwork attack vector

Unauthenticated prototype pollution via unfiltered form paths

Published May 27, 2026 · Updated May 27, 2026

Prototype pollution in @rvf/set-get 6.0.0 through 6.0.3 and 7.0.0 through 7.0.1 allows remote attackers to alter server object properties. setPath walks submitted field-name paths without rejecting proto, constructor, or prototype, causing assignments to reach Object.prototype. Any endpoint using parseFormData or createValidator is exposed by default; polluted properties persist for the worker lifetime and can corrupt application behavior or crash it.

CVSS severity8.2
High
EPSS probability0.31%
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 @rvf/set-get 6.0.0 through 6.0.3 and 7.0.0 through 7.0.1 allows remote attackers to alter server object properties. setPath walks submitted field-name paths without rejecting proto, constructor, or prototype, causing assignments to reach Object.prototype. Any endpoint using parseFormData or createValidator is exposed by default; polluted properties persist for the worker lifetime and can corrupt application behavior or crash it.

The record

CVE
CVE-2026-44483
Published
May 27, 2026
Updated
May 27, 2026
Vendor
Aaron Pettengill
Product
RVF
Classifications
CWE-1321, CAPEC-1, CAPEC-77, CAPEC-180, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 27, 2026CVE publishedPublication date reported by the CVE source.
  2. May 27, 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=>= 6.0.0, < 6.0.4
  2. Affected versionversion=>= 7.0.0, < 7.0.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Aaron Pettengill · RVFversion=>= 6.0.0, < 6.0.4; version=>= 7.0.0, < 7.0.2
RVF · @rvf/set-getversion=>= 6.0.0, < 6.0.4; version=>= 7.0.0, < 7.0.2

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.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-1321Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
CAPEC-1Accessing Functionality Not Properly Constrained by ACLs
CAPEC-77Manipulating User-Controlled Variables
CAPEC-180Exploiting Incorrectly Configured Access Control Security Levels
T1190Exploit Public-Facing Application

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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