Is there a public PoC exploit available for EUVD-2026-31778?

Yes, a public proof-of-concept exploit is available for EUVD-2026-31778. Prioritise patching immediately. EPSS: 0.0%.

Pingvin Share EUVD-2026-31778

Q: What is the CVSS score of EUVD-2026-31778?

EUVD-2026-31778 has a CVSS 4.0 base score of 2.1 (Low). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.0%.

| CVE-2026-9519 LOW

Cross-site Scripting (XSS) (CWE-79)

2026-05-26 VulDB

GHSA-3c7f-qfqh-4hvx

XSS Pingvin Share

2.1

CVSS 4.0 · Vendor: VulDB

Severity by source

Vendor (VulDB) PRIMARY

2.1 LOW

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from Vendor (VulDB) · only source for this CVE.

CVSS VectorVendor: VulDB

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Scope

Lifecycle Timeline

Analysis Generated

Jun 08, 2026 - 13:01 vuln.today

Severity Changed

May 26, 2026 - 20:07 NVD

MEDIUM LOW

CVSS changed

May 26, 2026 - 20:07 NVD

4.3 (MEDIUM) 2.1 (LOW)

DescriptionCVE.org

A security flaw has been discovered in stonith404 pingvin-share up to 1.13.0. This affects the function getServerSideProps of the file frontend/src/pages/auth/signIn.tsx of the component Sign-in Auto-Redirect. The manipulation of the argument redirect results in cross site scripting. The attack may be performed from remote. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

AnalysisAI

Reflected cross-site scripting in pingvin-share's sign-in auto-redirect feature allows remote unauthenticated attackers to inject and execute arbitrary JavaScript in a victim's browser by manipulating the redirect query parameter. All releases from 1.0 through 1.13.0 (the full release history) are affected. A publicly available proof-of-concept exploit exists on GitHub, and the vendor has not responded to responsible disclosure — meaning no patch has been issued and no vendor advisory exists.