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Lightbend Alpakka Kafka logs credentials on debug level

Moderate severity GitHub Reviewed Published Apr 27, 2023 to the GitHub Advisory Database • Updated Sep 30, 2025

Package

maven com.typesafe.akka:akka-stream-kafka_2.11 (Maven)

Affected versions

< 4.0.2

Patched versions

None
maven com.typesafe.akka:akka-stream-kafka_2.12 (Maven)
< 4.0.2
4.0.2
maven com.typesafe.akka:akka-stream-kafka_2.13 (Maven)
< 4.0.2
4.0.2
maven com.typesafe.akka:akka-stream-kafka_3 (Maven)
< 4.0.2
4.0.2

Description

Lightbend Alpakka Kafka before 4.0.2 logs its configuration as debug information, and thus log files may contain credentials (if plain cleartext login is configured). This occurs in akka.kafka.internal.KafkaConsumerActor.

References

Published by the National Vulnerability Database Apr 27, 2023
Published to the GitHub Advisory Database Apr 27, 2023
Reviewed Apr 27, 2023
Last updated Sep 30, 2025

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(8th percentile)

Weaknesses

Cleartext Storage of Sensitive Information

The product stores sensitive information in cleartext within a resource that might be accessible to another control sphere. Learn more on MITRE.

Insertion of Sensitive Information into Log File

Information written to log files can be of a sensitive nature and give valuable guidance to an attacker or expose sensitive user information. Learn more on MITRE.

CVE ID

CVE-2023-29471

GHSA ID

GHSA-55vq-xpjf-r2xc

Source code

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