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01 Record

CVE-2026-105927

Apache Pulsar: Improper authorization of WebSocket consumer dead letter topic allows writes without PRODUCE permission

LowPUBLISHEDCNA: apache
CNA base score2.3 CVSS v4.0CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N

02 Description

Apache Pulsar: Improper authorization of WebSocket consumer dead letter topic allows writes without PRODUCE permission

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
0.43% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 37.7% of scored records. A rank, not a probability.
NVD base score
2.3 (CVSS v4.0), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:L/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
NVD analysis status
Awaiting Analysis. NVD last modified this record on 2026-10-22.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-10-21 18:00Z7 DAYS AGO
Last updated
2026-10-21 18:00Z7 DAYS AGO
Reserved
2026-10-06
Assigning CNA
apache
Record state
PUBLISHED
Severity
Low (CVSS 2.3)
CNA CVSS vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
Weaknesses
  • CWE-863Incorrect AuthorizationClass
Data version
5.2
Document digest
617a50a5fc6797d915d2e8dac5b64306b9f899b6e60374ce36e2ce4e3c7c4cab

05 Affected products

VendorProductVersionsPlatforms
Apache Software FoundationApache Pulsar2.3.0 to < 4.0.14, 4.1.0 to < 4.2.5—

06 References