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CVE-2023-31007

Apache Pulsar: Broker does not always disconnect client when authentication data expires

MEDIUM
6.5
CVSS Score
Published: July 12, 2023 at 09:07 AM UTC
Updated: June 17, 2026 at 05:56 AM UTC
1 product affected across 1 vendorPulsar

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Severity
MEDIUM6.5
Exploit prediction
EPSS 1%
SSVC
No known exploit

Description

Improper Authentication vulnerability in Apache Software Foundation Apache Pulsar Broker allows a client to stay connected to a broker after authentication data expires if the client connected through the Pulsar Proxy when the broker is configured with authenticateOriginalAuthData=false or if a client connects directly to a broker with a specially crafted connect command when the broker is configured with authenticateOriginalAuthData=false. This issue affects Apache Pulsar: through 2.9.4, from 2.10.0 through 2.10.3, 2.11.0. 2.9 Pulsar Broker users should upgrade to at least 2.9.5. 2.10 Pulsar Broker users should upgrade to at least 2.10.4. 2.11 Pulsar Broker users should upgrade to at least 2.11.1. 3.0 Pulsar Broker users are unaffected. Any users running the Pulsar Broker for 2.8.* and earlier should upgrade to one of the above patched versions.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Pulsar· Apachemaven
95%
v < 2.9.52.10.0 ≤ v ≤ 2.10.32.10.02.11.02.11.0 candidate_12.11.0 candidate_5
Affected range stops below 2.9.5, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor AdvisoryMailing List
Source: [email protected]
https://lists.apache.org/thread/qxn99xxyp0zv6jchjggn3soyo5gvqfxj

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-287

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