CVE-2023-29471

Lightbend Alpakka Kafka logs credentials on debug level

5.5 MediumFix available

Lightbend Alpakka Kafka before 5.0.0 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.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: None
Availability: None

Exploit likelihood

0.15%Up 0.1 points since Apr 28, 2023

What each source reports

NVD Score used 5.5

Record: CVE-2023-29471
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness: CWE-312
Updated: 2026-11-02

CVE List 5.5

Record: CVE-2023-29471
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness: CWE-312
Updated: 2026-11-02

EUVDEUVD-2023-1201 5.5

Record: EUVD-2023-1201
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Updated: 2026-11-03

GitHub AdvisoriesGHSA-55vq-xpjf-r2xc 5.5

Lightbend Alpakka Kafka logs credentials on debug level

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.

Record: GHSA-55vq-xpjf-r2xc
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness: CWE-312, CWE-532
Updated: 2026-11-02

OSV 5.5

Record: CVE-2023-29471
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Updated: 2026-11-02

OSVGHSA-55vq-xpjf-r2xc 5.5

Lightbend Alpakka Kafka logs credentials on debug level

Record: GHSA-55vq-xpjf-r2xc
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness: CWE-312, CWE-532
Updated: 2026-11-02

Affected products

lightbend alpakka kafka

Affected packages

Affected packages
Package	Affected	Fixed
`com.typesafe.akka:akka-stream-kafka_3` Maven	before 4.0.2	4.0.2
`com.typesafe.akka:akka-stream-kafka_2.13` Maven	before 4.0.2	4.0.2
`com.typesafe.akka:akka-stream-kafka_2.12` Maven	before 4.0.2	4.0.2
`com.typesafe.akka:akka-stream-kafka_2.11` Maven	before 4.0.2	4.0.2
`com.typesafe.akka:akka-stream-kafka_3` Maven	before 4.0.2, plus listed versions 4.0.1	4.0.2
`com.typesafe.akka:akka-stream-kafka_2.13` Maven	before 4.0.2, plus listed versions 1.0.41.0.51.1.01.1.0-RC11.1.0-RC2 Show 21 moreShow less 2.0.02.0.0-M22.0.0-RC12.0.12.0.22.0.32.0.42.0.52.0.62.0.72.1.02.1.0-M12.1.0-RC12.1.13.0.03.0.0-RC13.0.13.1.0-M13.1.0-M24.0.04.0.1	4.0.2
`com.typesafe.akka:akka-stream-kafka_2.12` Maven	before 4.0.2, plus listed versions 0.130.140.150.160.17 Show 36 moreShow less 0.180.190.200.210.21.10.221.01.0-M11.0-RC11.0-RC21.0.11.0.21.0.31.0.41.0.51.1.01.1.0-RC11.1.0-RC22.0.02.0.0-M22.0.0-RC12.0.12.0.22.0.32.0.42.0.52.0.62.0.72.1.02.1.0-M12.1.0-RC12.1.13.1.0-M13.1.0-M24.0.04.0.1	4.0.2
`com.typesafe.akka:akka-stream-kafka_2.11` Maven	All versions, plus listed versions 0.110.11-M10.11-M20.11-M30.11-M4 Show 37 moreShow less 0.11-RC10.11-RC20.120.130.140.150.160.170.180.190.200.210.21.10.221.01.0-M11.0-RC11.0-RC21.0.11.0.21.0.31.0.41.0.51.1.01.1.0-RC11.1.0-RC22.0.02.0.0-M12.0.0-M22.0.0-RC12.0.12.0.22.0.32.0.42.0.52.0.62.0.7	None known

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2023-29471 is a medium vulnerability (CVSS 5.5) in Lightbend Alpakka Kafka, published April 27, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.15%, the 4th percentile. Fixed in com.typesafe.akka:akka-stream-kafka_3 4.0.2.