Cross-Site Scripting Vulnerability in stonith404 Pingvin-Share
CVE-2026-9519

5.3MEDIUM

Key Information:

Vendor

Stonith404

Status
Pingvin-share
Vendor
CVE Published:
26 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-9519?

A security flaw has been identified in the 'Sign-in Auto-Redirect' functionality of the Pingvin-Share application. The issue lies within the 'getServerSideProps' function, specifically in the handling of the 'redirect' argument within 'frontend/src/pages/auth/signIn.tsx'. This vulnerability enables an attacker to execute malicious scripts in the context of users visiting the affected web page, allowing for potential data theft and session hijacking. The flaw can be exploited remotely, and public knowledge of the exploit could lead to increased attempts of attacks. Despite early warnings to the vendor, there has been no response regarding the resolution of this issue.

Affected Version(s)

pingvin-share 1.0

pingvin-share 1.1

pingvin-share 1.2

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-2026-9519 - Proof of Concept

References

https://vuldb.com/vuln/365539
vdb-entrytechnical-description
https://vuldb.com/vuln/365539/cti
signaturepermissions-required
https://vuldb.com/submit/814364
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

trebledj (VulDB User)
VulDB CNA Team
.