Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-63096— Dendrite 0.13.8 SSRF via Unauthenticated Legacy Media Download Endpoint

Quick assessment

Affected
matrix-org dendrite
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Matrix Dendrite是Matrix基金会开源的一个用 Go 编写的第二代 Matrix 家庭服务器。 Matrix Dendrite 0.13.8及之前版本存在服务端请求伪造漏洞，该漏洞源于服务端请求伪造问题，可能导致未经身份验证的攻击者通过向旧的媒体下载端点提供未经验证的serverName参数，使服务器打开对任意主机和端口的出站TLS连接，并利用可区分的错误响应类和泄露的内部IP地址执行盲端口扫描和枚举内部网络拓扑。

CVSS 5.8 · Medium EPSS 0.34% · P25

Affected Version Matrix 1

VendorProduct Version RangeStatus
matrix-org dendrite ≤ 0.13.8 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-63096

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Dendrite 0.13.8 SSRF via Unauthenticated Legacy Media Download Endpoint
Source: CVE Program / CVE List V5
Vulnerability Description
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 parameter to the legacy media download endpoint. Attackers can exploit distinguishable error response classes and leaked internal IP addresses in error messages to perform blind port scanning and enumerate internal network topology.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
Matrix Dendrite 服务端请求伪造漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Matrix Dendrite是Matrix基金会开源的一个用 Go 编写的第二代 Matrix 家庭服务器。 Matrix Dendrite 0.13.8及之前版本存在服务端请求伪造漏洞，该漏洞源于服务端请求伪造问题，可能导致未经身份验证的攻击者通过向旧的媒体下载端点提供未经验证的serverName参数，使服务器打开对任意主机和端口的出站TLS连接，并利用可区分的错误响应类和泄露的内部IP地址执行盲端口扫描和枚举内部网络拓扑。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
matrix-org dendrite 0 ~ 0.13.8 -

II. Public POCs for CVE-2026-63096

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-63096

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-63096 (1)

Proof of Concept for CVE-2026-63096 (1)

Same Patch Batch · matrix-org · 2026-07-17 · 3 CVEs total

CVE-2026-63095 6.5 MEDIUM Dendrite 0.13.8 Improper Authorization via POST account/3pid/delete Endpoint
CVE-2026-63097 4.3 MEDIUM Dendrite 0.13.8 syncapi /context Endpoint Post-Leave State Exposure

IV. Related Vulnerabilities

Same product: dendrite
Same vendor: matrix-org
Same weakness: CWE-918

V. Comments for CVE-2026-63096

No comments yet

Leave a comment