CVE-2026-24044— ESS Community Helm Chart has a weak server key generation method
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I. Basic Information for CVE-2026-24044
Vulnerability Information
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Vulnerability Title
ESS Community Helm Chart has a weak server key generation method
Source: NVD (National Vulnerability Database)
Vulnerability Description
Element Server Suite Community Edition (ESS Community) deploys a Matrix stack using the provided Helm charts and Kubernetes distribution. The ESS Community Helm Chart secrets initialization hook (using matrix-tools container before 0.5.7) is using an insecure Matrix server key generation method, allowing network attackers to potentially recreate the same key pair, allowing them to impersonate the victim server. The secret is generated by the secrets initialization hook, in the ESS Community Helm Chart values, if both initSecrets.enabled is not set to false and synapse.signingKey is not defined. Given a server key in Matrix authenticates both requests originating from and events constructed on a given server, this potentially impacts confidentiality, integrity and availability of rooms which have a vulnerable server present as a member. The confidentiality of past conversations in end-to-end encrypted rooms is not impacted. The key generation issue was fixed in matrix-tools 0.5.7, released as part of ESS Community Helm Chart 25.12.1.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
PRNG中使用相同种子
Source: NVD (National Vulnerability Database)
Vulnerability Title
Element Server Suite 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Element Server Suite是Element开源的一个服务器套件社区版。 Element Server Suite Community Edition (ESS Community)存在安全漏洞，该漏洞源于Matrix服务器密钥生成方法不安全，可能导致网络攻击者重新创建相同密钥对并冒充受害服务器。
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 |
|---|---|---|---|---|
| element-hq | ess-helm | < 25.12.1 | - | |
| element-hq | matrix-tools | < 0.5.7 | - |
II. Public POCs for CVE-2026-24044
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|---|
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Advisory · 1Patch · 1
- Weak server key generation method · Advisory · element-hq/ess-helm · GitHubx_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2026-24044
IV. Related Vulnerabilities
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