CVE-2026-63107 LimeSurvey SSRF via REST API Survey Template Host Header
Authenticated attackers can exploit an SSRF vulnerability in LimeSurvey's REST API to access internal services and steal cloud credentials via manipulated Host headers.
- 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-2026-63107?
CVE-2026-63107 is a medium-severity server-side request forgery vulnerability in LimeSurvey, published on 20 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
LimeSurvey through 6.17.10 and 7.0.4 contains a server-side request forgery vulnerability in the REST API survey template endpoint that allows authenticated users to cause the server to issue arbitrary HTTP requests by supplying a manipulated Host header. Attackers can exploit the unsanitized use of the HTTP Host header in the getTemplateData() function to reach internal network services, cloud metadata endpoints, and extract sensitive credentials such as IAM tokens from instance metadata services.
Weakness: CWE-918
Which versions are affected by CVE-2026-63107?
How do I fix CVE-2026-63107?
No fix has been published for CVE-2026-63107 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-2026-63107 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-63107 exists.
Sources
Also known as GHSA-34qp-wv4h-827h.