Stored Cross-Site Scripting Vulnerability in Vulnerability-Lookup by Vulnerability-Lookup
CVE-2026-73374

6.1MEDIUM

Key Information:

Vendor

Vulnerability-lookup

Status
Vulnerability-lookup
Vendor
CVE Published:
12 August 2026

What is CVE-2026-73374?

A stored cross-site scripting vulnerability exists in Vulnerability-Lookup when using the render_tag_badges Jinja filter. This vulnerability allows authenticated users to submit malicious HTML or JavaScript through crafted reference tags via the CNA API. When these tags are stored in the vulnerability records, they can be rendered as HTML when other users access the corresponding public pages. This exploitation may allow unauthorized actions, information access, and content manipulation, impacting users regardless of their authentication status. The issue has been addressed by implementing appropriate escaping measures.

Affected Version(s)

vulnerability-lookup 0 <= 5.5.1

References

https://github.com/vulnerability-lookup/vulnerability-loo...
patch

CVSS V4

Score:
6.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

openai/gpt-5.5-cyber-preview (reasoning level: high)
EUVD @ ENISA Team
Cedric Bonhomme
Alexandre Dulaunoy
.