Improper Input Validation in Apache Pulsar
In Apache Pulsar it is possible to access data from BookKeeper that does not belong to the topics accessible by the authenticated user. The Admin API get-message-by-id requires the user to input a topic and a ledger id. The ledger id is a pointer to the data, and it is supposed to be a valid it for the topic. Authorisation controls are performed against the topic name and there is not proper validation the that ledger id is valid in the context of such ledger. So it may happen that the user is able to read from a ledger that contains data owned by another tenant. This issue affects Apache Pulsar Apache Pulsar version 2.8.0 and prior versions; Apache Pulsar version 2.7.3 and prior versions; Apache Pulsar version 2.6.4 and prior versions.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | org.apache.pulsar:pulsar | <= 2.6.4, >= 2.7.0, < 2.7.4, >= 2.8.0, < 2.8.1 | 2.7.4, 2.8.1 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2021-41571
- https://github.com/apache/pulsar/issues/11814
- https://github.com/apache/pulsar/pull/11852
- https://github.com/apache/pulsar/pull/11912
- https://github.com/apache/pulsar/pull/11913
- https://github.com/apache/pulsar
- https://github.com/apache/pulsar/releases/tag/v2.7.4
- https://github.com/apache/pulsar/releases/tag/v2.8.1
- https://lists.apache.org/thread/8n3k7pvyh4cf9q2jfzb6pb32ync6xlvr
- https://pulsar.apache.org/admin-rest-api/#operation/getLastMessageId
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N- Weakness (CWE)
CWE-20, CWE-863- Platform
- Java / Kotlin (Maven)
- Package
org.apache.pulsar:pulsar- Disclosed
- 02.02.2022
- Updated
- 11.10.2026 11:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-3whx-qrj5-hh2h - CC BY 4.0
Vulnerability history: org.apache.pulsar:pulsar
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 4
- First → latest
- 06.2021 07.2023
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 2
- Medium 2
Disclosures per year
- 2021: 1
- 2022: 2
- 2023: 1
- 2024: 0
- 2025: 0
- 2026: 0
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