CVE-2026-105936: Apache Pulsar: The Pulsar Functions worker REST API provides two endpoints that return the catalog of Pulsar IO connectors installed on the functions worker: the worker connectors endpoint (/admin/v2/worker/connectors) and the deprecated functions connectors endpoint (/admin/v2/functions/connectors and /admin/v3/functions/connectors)
This Apache advisory covers CVE-2026-105936 in Apache Pulsar.
- CVE-2026-105936
Key facts
- Vendor rating
- Medium, CVSS 5.3
- CISA KEV
- Not listed (catalogue checked )
- Affected
- 2.4.1 before 4.0.14; 4.1.0 before 4.2.5
- Fixed in
- 4.0.14, 4.2.5
- Source published
- Source revised
- Listed by VulniPulse
- Record changed
Compiled by VulniPulse from the linked sources. How records are collected and checked.
Affected products & platforms
Description
The Pulsar Functions worker REST API provides two endpoints that return the catalog of Pulsar IO connectors installed on the functions worker: the worker connectors endpoint (/admin/v2/worker/connectors) and the deprecated functions connectors endpoint (/admin/v2/functions/connectors and /admin/v3/functions/connectors).
When authorization is enabled, the worker connectors endpoint requires super-user access. The functions connectors endpoint, served both by the functions worker and by a broker running the functions worker, returns the same catalog without this check.
Unauthenticated requests are rejected unless anonymous access is configured with an anonymous user role.
The catalog contains the connector type definitions installed in the functions worker's connectors directory: the connector name, its description, and the source, sink and configuration class names.
It does not contain configured source or sink instances, their configuration values or credentials, and an installed connector type does not indicate that a connector is configured or running. The impact is limited to disclosure of this metadata, which can include the names and descriptions of custom connectors installed by the operator.
The issue does not allow modifying the catalog or managing connectors.
Affected product named by the advisory: Apache Pulsar.
Text from the source record.
- 2.4.1 before 4.0.14
- 4.1.0 before 4.2.5
Official advisory · high-confidence parse· fetched ·verify at source
How to fix CVE-2026-105936
Upgrade to a fixed release named by Apache:
- 4.0.14
- 4.2.5
Vendor guidance
- This issue affects Apache Pulsar versions from 2.4.1 before 4.0.14 and from 4.1.0 before 4.2.5. - 4.0.x version users should upgrade to at least 4.0.14. - 4.1.x and 4.2.x version users should upgrade to at least 4.2.5.
- Users operating versions prior to those listed above should upgrade to the aforementioned patched versions or newer versions.
More Apache Software Foundation advisories
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Apache Software Foundation advisories, October 2026All Apache Software Foundation advisories
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