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
06 References
- pulsar.apache.orghttps://pulsar.apache.org/security/CVE-2026-105927/
- lists.apache.orghttps://lists.apache.org/thread.html/1577zmjsxssb9zkg34sjzcl71om145bd