Server-Side Request Forgery Vulnerability in Emlog by Emlog
CVE-2026-21433

7.7HIGH

Key Information:

Vendor

Emlog

Status
Emlog
Vendor
CVE Published:
2 January 2026

What is CVE-2026-21433?

Emlog, an open-source website building system, is susceptible to server-side request forgery (SSRF) through malicious SVG file uploads. This vulnerability allows attackers to upload crafted SVG files which reference external resources. When the Emlog server processes these SVG files—whether for thumbnail creation, previewing, or sanitization—it inadvertently makes HTTP requests to the attacker's controlled server. This behavior can lead to unauthorized probing of internal networks, with the potential risk of exposing sensitive metadata and credentials. Currently, there are no known patched versions to mitigate this risk.

Affected Version(s)

emlog <= 2.5.19

References

https://github.com/emlog/emlog/security/advisories/GHSA-6...
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CVSS V3.1

Score:
7.7
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.