Prototype Pollution Vulnerability in Ractive.js by Ractive
CVE-2026-78181

6.9MEDIUM

Key Information:

Vendor

Ractivejs

Status
Ractive
Vendor
CVE Published:
24 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-78181?

A vulnerability exists in Ractive.js, affecting version 1.4.4 and earlier, specifically in the Keypath Handler's Ractive#set function. This weakness allows attackers to manipulate object prototype attributes, potentially leading to unauthorized modifications. The vulnerability can be exploited remotely, and public exploit information has been released, putting systems at risk. Although the issue was reported to the developers, no response has been provided yet, raising concerns about the security of applications using this library.

Affected Version(s)

ractive 1.4.0

ractive 1.4.1

ractive 1.4.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-78181 - Proof of Concept

References

https://vuldb.com/vuln/394565
vdb-entrytechnical-description
https://vuldb.com/vuln/394565/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-78181
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

wjm3 (VulDB User)
VulDB CNA Team
.