Critical severity9.8NVD Advisory· Published May 26, 2021· Updated Jun 17, 2026
CVE-2021-22160
CVE-2021-22160
Description
If Apache Pulsar is configured to authenticate clients using tokens based on JSON Web Tokens (JWT), the signature of the token is not validated if the algorithm of the presented token is set to "none". This allows an attacker to connect to Pulsar instances as any user (incl. admins).
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
org.apache.pulsar:pulsarMaven | < 2.7.2 | 2.7.2 |
Affected products
2Patches
Vulnerability mechanics
References
20- github.com/advisories/GHSA-3cv4-xxv7-934qghsaADVISORY
- lists.apache.org/thread.html/r347650d15a3e9c5f58b83e918b6ad6dedc2a63d3eb63da8e6a7be87e%40%3Cusers.pulsar.apache.org%3EnvdMailing ListVendor AdvisoryWEB
- lists.apache.org/thread.html/r9a12b4da2f26ce9b8f7e7117a879efaa973dab7e54717bbc7923fab1%40%3Cdev.pulsar.apache.org%3EnvdMailing ListVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2021-22160ghsaADVISORY
- github.com/apache/pulsar/releases/tag/v2.7.2ghsaWEB
- lists.apache.org/thread.html/r08c7df60cae031361df7fbac39d08b6d5b5079e74db5195d409db9a2@%3Cdev.pulsar.apache.org%3EghsaWEB
- lists.apache.org/thread.html/r8e545559781231a83bf0644548c660255859e52feb86bbfcd42590da@%3Cdev.pulsar.apache.org%3EghsaWEB
- lists.apache.org/thread.html/ra49cb62105154e4795b259c79a6b27d63bfa2ab5787ff8529b089550@%3Cdev.pulsar.apache.org%3EghsaWEB
- lists.apache.org/thread.html/ra49cb62105154e4795b259c79a6b27d63bfa2ab5787ff8529b089550@%3Cusers.pulsar.apache.org%3EghsaWEB
- lists.apache.org/thread.html/rbe845aa1573a61769b9c5916c62971f4b10de87c2ea5f38a97f0cf84@%3Cdev.pulsar.apache.org%3EghsaWEB
- lists.apache.org/thread.html/rca54f4b26ba5e6f2e39732b47ec51640e89f57e3b6a38ac3bab314df@%3Cdev.pulsar.apache.org%3EghsaWEB
- lists.apache.org/thread.html/re2ae364e0c02093dc721699698c6f23cfbba0220c78b5e28cafeae81@%3Ccommits.pulsar.apache.org%3EghsaWEB
- lists.apache.org/thread.html/rf2e90942996dceebac8296abf39257cfeb5ae918f82f7af3d37a48c5@%3Cdev.pulsar.apache.org%3EghsaWEB
- lists.apache.org/thread.html/rf54fefc25c49d4715d484133d438f13bf2e515a5fed5d3a745d4f6e7@%3Ccommits.pulsar.apache.org%3EghsaWEB
- lists.apache.org/thread.html/r8e545559781231a83bf0644548c660255859e52feb86bbfcd42590da%40%3Cdev.pulsar.apache.org%3Envd
- lists.apache.org/thread.html/ra49cb62105154e4795b259c79a6b27d63bfa2ab5787ff8529b089550%40%3Cdev.pulsar.apache.org%3Envd
- lists.apache.org/thread.html/ra49cb62105154e4795b259c79a6b27d63bfa2ab5787ff8529b089550%40%3Cusers.pulsar.apache.org%3Envd
- lists.apache.org/thread.html/rbe845aa1573a61769b9c5916c62971f4b10de87c2ea5f38a97f0cf84%40%3Cdev.pulsar.apache.org%3Envd
- lists.apache.org/thread.html/rca54f4b26ba5e6f2e39732b47ec51640e89f57e3b6a38ac3bab314df%40%3Cdev.pulsar.apache.org%3Envd
- lists.apache.org/thread.html/rf2e90942996dceebac8296abf39257cfeb5ae918f82f7af3d37a48c5%40%3Cdev.pulsar.apache.org%3Envd
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