CVE-2026-105945 Apache Pulsar - Broken Access Control

Apache Pulsar 2.10.0 < 4.0.14 and 4.1.0 < 4.2.5 contain a broken access control caused by improper validation of package version in filesystem storage provider, letting authenticated users with packages permission on any namespace access or modify packages in other tenants or namespaces, exploit requires package management enabled with filesystem storage provider.

CVSS base score 7.7 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Data Tampering, Information Disclosure, Denial Of Service
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:L/SA:L/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-22

Vendor fix

Upgrade to at least 4.0.14 for 4.0.x versions or 4.2.5 for 4.1.x and 4.2.x versions, or later.

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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