CVE-2024-56128

MEDIUMNVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.3 under NVD CVSS v3. EPSS exploit probability: 0.5%, top 33% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
5.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 1%CVSS: 5.3Exploit: NoneExposed: 0

A fix is available — apply it.

Incorrect Implementation of Authentication Algorithm in Apache Kafka's SCRAM implementation.

Issue Summary: Apache Kafka's implementation of the Salted Challenge Response Authentication Mechanism (SCRAM) did not fully adhere to the requirements of RFC 5802 [1]. Specifically, as per RFC 5802, the server must verify that the nonce sent by the client in the second message matches the nonce sent by the server in its first message. However, Kafka's SCRAM implementation did not perform this validation.

Impact: This vulnerability is exploitable only when an attacker has plaintext access to the SCRAM authentication exchange. However, the usage of SCRAM over plaintext is strongly discouraged as it is considered an insecure practice [2]. Apache Kafka recommends deploying SCRAM exclusively with TLS encryption to protect SCRAM exchanges from interception [3]. Deployments using SCRAM with TLS are not affected by this issue.

How to Detect If You Are Impacted: If your deployment uses SCRAM authentication over plaintext communication channels (without TLS encryption), you are likely impacted. To check if TLS is enabled, review your server.properties configuration file for listeners property. If you have SASL_PLAINTEXT in the listeners, then you are likely impacted.

Fix Details: The issue has been addressed by introducing nonce verification in the final message of the SCRAM authentication exchange to ensure compliance with RFC 5802.

Affected Versions: Apache Kafka versions 0.10.2.0 through 3.9.0, excluding the fixed versions below.

Fixed Versions: 3.9.0 3.8.1 3.7.2

Users are advised to upgrade to 3.7.2 or later to mitigate this issue.

Recommendations for Mitigation: Users unable to upgrade to the fixed versions can mitigate the issue by:

  • Using TLS with SCRAM Authentication:
Always deploy SCRAM over TLS to encrypt authentication exchanges and protect against interception.
  • Considering Alternative Authentication Mechanisms:
Evaluate alternative authentication mechanisms, such as PLAIN, Kerberos or OAuth with TLS, which provide additional layers of security.

CVSS v3
5.3
EG Score
5.3(medium)
EPSS
51.6%
KEV
Not listed

Published

December 18, 2024

Last Modified

June 20, 2025

References (5)

Vendor Advisories for CVE-2024-56128(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatorg.apache.kafka/kafka_2.132025-12-16redhat
redhatpatch2025-08-01redhat
redhatpatch2025-06-30redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(4 across 1 ecosystem)
Maven(4)
PackageVulnerable rangeFixed inDependents
org.apache.kafka:kafka_2.100.10.2.0, 0.10.2.1, 0.10.2.2——
org.apache.kafka:kafka_2.110.10.2.0 ... 2.4.1 (23 versions)——
org.apache.kafka:kafka_2.123.8.03.8.1—
org.apache.kafka:kafka_2.133.8.03.8.1—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 10× in last 7d / 44× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-11 08:26 UTCEPSS rescore
  2. 2026-07-09 19:09 UTCEPSS rescore
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  14. 2026-06-30 23:21 UTCEPSS rescore
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  16. 2026-06-29 14:05 UTCEPSS rescore
  17. 2026-06-28 14:07 UTCEPSS rescore
  18. 2026-06-28 04:55 UTCEPSS rescore
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  22. 2026-06-25 13:49 UTCEPSS rescore
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  24. 2026-06-25 13:31 UTCOSV refresh
  25. 2026-06-24 14:04 UTCEPSS rescore
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  1. 2026-06-24 14:04 UTCEPSS rescore
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  5. 2026-06-21 14:56 UTCEPSS rescore
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  7. 2026-06-21 01:59 UTCEPSS rescore
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  22. 2026-06-10 22:18 UTCEPSS rescore
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  24. 2026-06-10 13:21 UTCEPSS rescore
  25. 2026-06-08 14:16 UTCEPSS rescore
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  27. 2026-06-08 03:58 UTCOSV refresh
  28. 2026-06-07 15:24 UTCEPSS rescore
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  30. 2026-06-06 13:46 UTCEPSS rescore
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  43. 2026-05-31 22:30 UTCEPSS rescore
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  45. 2026-05-31 00:16 UTCEPSS rescore
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  47. 2026-05-29 13:43 UTCEPSS rescore
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  55. 2026-05-26 07:18 UTCEPSS rescore
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  57. 2026-05-26 07:18 UTCEPSS rescore
  58. 2026-05-23 16:18 UTCEG score recompute
  59. 2026-05-23 16:18 UTCVendor advisory

Frequently asked(5)

What is CVE-2024-56128?
CVE-2024-56128 is a medium vulnerability published on December 18, 2024. Incorrect Implementation of Authentication Algorithm in Apache Kafka's SCRAM implementation. Issue Summary: Apache Kafka's implementation of the Salted Challenge Response Authentication Mechanism (SCRAM) did not fully adhere to the requirements of RFC 5802 [1]. Specifically, as per RFC 5802, the…
When was CVE-2024-56128 disclosed?
CVE-2024-56128 was first published in the National Vulnerability Database on December 18, 2024, with the most recent update on June 20, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-56128 actively exploited?
CVE-2024-56128 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 51.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2024-56128?
CVE-2024-56128 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2024-56128?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-56128, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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