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MEDIUM severity

CVE-2025-53393 — akka-cluster-metrics_3

MEDIUMFix: akka/akka#32748

CVE-2025-53393 is a medium-severity (CVSS 6) Deserialization of Untrusted Data vulnerability in com.typesafe.akka:akka-cluster-metrics_3. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.

akka-cluster-metrics uses Java serialization for cluster metrics

Also known asGHSA-358m-fq53-hp87
Published
Updated
Affected
2 pkgs
Patched
See advisory
Exploits
None indexed
Exploitation data as of Oct 26, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2025-53393.

EPSS Exploitation Probability

via FIRST.org ↗
0.2%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs13th percentile — riskier than 13% of all scored CVEsHighest risk
0.00%0.27%0.53%0.80%0.1%0.2%Apr 26Aug 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

2 pkgs affected
☕com.typesafe.akka:akka-cluster-metrics_3☕com.typesafe.akka:akka-cluster-metrics_2.13

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

In Akka through 2.10.6, akka-cluster-metrics uses Java serialization for cluster metrics.

Affected Packages

2 total
EcosystemPackageVulnerable rangeFix
☕Mavencom.typesafe.akka:akka-cluster-metrics_3all versionsNo fix
☕Mavencom.typesafe.akka:akka-cluster-metrics_2.13all versionsNo fix

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for com.typesafe.akka:akka-cluster-metrics_3, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Remediation status

    The records we use list no patched version of com.typesafe.akka:akka-cluster-metrics_3 for CVE-2025-53393. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.

  3. Mitigate without a patch

    Do not deserialise data from untrusted sources: where the format allows it, restrict deserialisation to an explicit allowlist of expected types, and prefer a data-only format (JSON, Protobuf) over one that can reconstruct arbitrary objects until you can upgrade.

Frequently Asked Questions

In Akka through 2.10.6, akka-cluster-metrics uses Java serialization for cluster metrics.
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CVE-2025-53393: akka-cluster-metrics_3 (Medium 6)