Lightbend Alpakka Kafka logs credentials on debug level

published 2023-04-27 3 y ago modified 2026-06-17 4 mo ago also GHSA-55vq-xpjf-r2xc , EUVD-2023-1201

cvss: 5.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 4%
public exploits: 0; none known

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.

Patch / fix

fixed in 4 links 1

maven com.typesafe.akka:akka-stream-kafka_3 4.0.2
maven com.typesafe.akka:akka-stream-kafka_2.13 4.0.2
maven com.typesafe.akka:akka-stream-kafka_2.12 4.0.2
lightbend alpakka_kafka 4.0.2

github.com/akka/alpakka-kafka#1614 commit

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 21 mo ago (2025-01-31)

Exploit prediction

0.15% chance of exploitation in the next 30 days, higher than 4% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	5.5	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
NVD	3.1	5.5	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CNA	3.1	5.5	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
GitHub	3.1	5.5	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected packages

ecosystem	package	affected	fixed in
maven	com.typesafe.akka:akka-stream-kafka_3	<4.0.2	4.0.2
maven	com.typesafe.akka:akka-stream-kafka_2.13	<4.0.2	4.0.2
maven	com.typesafe.akka:akka-stream-kafka_2.12	<4.0.2	4.0.2
maven	com.typesafe.akka:akka-stream-kafka_2.11	all versions	no fix listed

Classification

Weakness

CWE-312 Cleartext Storage of Sensitive Information
CWE-532 Insertion of Sensitive Information into Log File

References

github.com /akka/alpakka-kafka/pull/1614/commits/4011b704e93b22f6fd956aac516c7159d384644c
web
akka.io /security/alpakka-kafka-cve-2023-29471.html
web, vendor-advisory
github.com /akka/alpakka-kafka/issues/1592
web, issue-tracking
nvd.nist.gov /vuln/detail/CVE-2023-29471
advisory
github.com /akka/alpakka-kafka
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary