CVE-2026-105934 Apache Pulsar - Broken Access Control

Apache Pulsar 2.8.0 < versions < 4.0.14 and 4.1.0 < versions < 4.2.5 contain an authorization bypass caused by improper tenant admin role checks on partitioned topic truncation in the broker admin REST API, letting authenticated users with lookup permission truncate partitioned topics, skipping unacknowledged messages and deleting older ledgers, exploit requires authenticated user with lookup permission.

CVSS base score 7.2 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Data Tampering, Denial Of Service
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published
21 October 2026
Updated
22 October 2026
Weakness
CWE-862

Vendor fix

Upgrade to Apache Pulsar 4.0.14, 4.2.5 or later versions.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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