OpenObserve up to 0.90.2 Server Configuration Serialization /config/runtime information disclosure

Summaryinfo

A vulnerability was found in OpenObserve up to 0.90.2. It has been rated as problematic. Impacted is an unknown function of the file /config/runtime of the component Server Configuration Serialization. Performing a manipulation of the argument meta_postgres_dsn/meta_postgres_ro_dsn/meta_ddl_dsn/usage_reporting_creds results in information disclosure. This vulnerability is cataloged as CVE-2026-63645. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as problematic has been found in OpenObserve up to 0.90.2. This affects an unknown function of the file /config/runtime of the component Server Configuration Serialization. The manipulation of the argument meta_postgres_dsn/meta_postgres_ro_dsn/meta_ddl_dsn/usage_reporting_creds with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. The summary by CVE is:

OpenObserve is a cloud-native observability platform. Prior to 0.90.3, OpenObserve registers the /config/runtime endpoint without authentication and serializes the complete server configuration after applying the hide_sensitive_fields keyword filter. The filter does not recognize dsn or creds field names, so meta_postgres_dsn, meta_postgres_ro_dsn, meta_ddl_dsn, and usage_reporting_creds can be returned in plaintext to an unauthenticated network client. PostgreSQL deployments can expose database credentials, and the same response can disclose the root administrator email address, internal NATS address, filesystem layout, and other deployment details. This issue is fixed in version 0.90.3.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-63645 since 07/17/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

Upgrading to version 0.90.3 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

• OpenObserve

Version

• 0.90.0
• 0.90.1
• 0.90.2

Website

• Product: https://github.com/openobserve/openobserve/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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