element-hq ess-helm up to 25.12.0 prng seed

Summaryinfo

A vulnerability was found in element-hq ess-helm up to 25.12.0. It has been declared as problematic. This affects an unknown part. Executing a manipulation can lead to prng seed. This vulnerability is registered as CVE-2026-24044. It is possible to launch the attack remotely. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in element-hq ess-helm up to 25.12.0 and classified as problematic. This vulnerability affects some unknown processing. The manipulation with an unknown input leads to a prng seed vulnerability. The CWE definition for the vulnerability is CWE-336. A Pseudo-Random Number Generator (PRNG) uses the same seed each time the product is initialized. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-24044 since 01/20/2026. The exploitation appears to be difficult. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1600.001.

Upgrading to version 25.12.1 eliminates this vulnerability. The upgrade is hosted for download at github.com.

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Productinfo

Vendor

• element-hq

Name

• ess-helm

Version

• 25.0
• 25.1
• 25.2
• 25.3
• 25.4
• 25.5
• 25.6
• 25.7
• 25.8
• 25.9
• 25.10
• 25.11
• 25.12.0

Website

• Product: https://github.com/element-hq/ess-helm/

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