What is CVE-2026-63096?

CVE-2026-63096 is a medium-severity vulnerability in Matrix-org Dendrite, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.8/10. Published 2026-07-17.

How severe is CVE-2026-63096?

Medium severity. CVSS v3 base score is 5.8 out of 10.

SSRF in Matrix-org Dendrite

CVE-2026-63096

Dendrite through 0.13.8 contains a server-side request forgery vulnerability that allows unauthenticated attackers to cause the server to open outbound TLS connections to arbitrary hosts and ports by supplying an unvalidated serverName par…

Vulnerability class: SSRF (Server-Side Request Forgery)

CVSS v3 metric

CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N.

Affected products

Matrix-org Dendrite — versions 0

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

disclosure@vulncheck.com (technical-description, exploit)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-63096?: CVE-2026-63096 is a medium-severity vulnerability in Matrix-org Dendrite, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.8/10. Published 2026-07-17.
How severe is CVE-2026-63096?: Medium severity. CVSS v3 base score is 5.8 out of 10.