CVE-2026-21433 Emlog vulnerable to Server-Side Request Forgery (SSRF)
Attackers can trigger server-side requests via crafted SVG uploads in Emlog, enabling internal network probing and potential credential exposure.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-21433?
CVE-2026-21433 is a high-severity server-side request forgery vulnerability in Emlog Emlog, published on 2 Jan 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Emlog is an open source website building system. Versions up to and including 2.5.19 are vulnerable to server-side Out-of-Band (OOB) requests / SSRF via uploaded SVG files. An attacker can upload a crafted SVG to http[:]//emblog/admin/media[.]php which contains external resource references. When the server processes/renders the SVG (thumbnailing, preview, or sanitization), it issues an HTTP request to the attacker-controlled host. Impact: server-side SSRF/OOB leading to internal network probing and potential metadata/credential exposure. As of time of publication, no known patched versions are available.
Weakness: CWE-918
Which versions are affected by CVE-2026-21433?
It affects 1 product.
Products include Emlog Emlog.
How do I fix CVE-2026-21433?
No fix has been published for CVE-2026-21433 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-21433 being exploited?
There is no known exploitation of CVE-2026-21433 in the wild and no public exploit code.
Other vulnerabilities in Emlog Emlog
Sources
Also known as GHSA-6rwr-c8hc-mjj4.