Summary
Apache Camel-PQC: The AWS Secrets Manager key-lifecycle manager deserializes persisted key metadata with java.io.ObjectInputStream and no ObjectInputFilter
Deserialization of Untrusted Data vulnerability in Apache Camel PQC Component.
The camel-pqc component persists post-quantum key metadata (KeyMetadata) through pluggable KeyLifecycleManager implementations. AwsSecretsManagerKeyLifecycleManager.deserializeMetadata() reads that metadata back from the configured AWS Secrets Manager secret by Base64-decoding the stored value and deserializing it with a raw java.io.ObjectInputStream.readObject() and no ObjectInputFilter or class allow-list; the cast to KeyMetadata happens only after readObject() returns, so any readObject() side effects in a crafted object run before the type check. A principal who can write to the AWS Secrets Manager secret that holds this metadata (requiring secretsmanager:PutSecretValue on that secret) could store a crafted serialized object that is deserialized during normal key-lifecycle operations, potentially leading to code execution in the context of the application that manages the keys. This is the same underlying defect, in the same code path and remediated by the same fix, as CVE-2026-46590, which was reported independently and additionally covers the HashiCorp Vault and file-based sibling managers; both are incomplete-remediation follow-ons to CVE-2026-40048 (CAMEL-23200).
This issue affects Apache Camel: from 4.18.0 before 4.18.3, from 4.19.0 before 4.21.0.
Users are recommended to upgrade to version 4.21.0, which fixes the issue. If users are on the 4.18.x LTS releases stream, then they are suggested to upgrade to 4.18.3. For deployments that cannot upgrade immediately, restrict write access to the AWS Secrets Manager secret that holds the camel-pqc key metadata so that only the application’s own identity holds secretsmanager:PutSecretValue on it (least-privilege IAM), and keep the PQC key material in a secret separate from any data that less-trusted principals can write.
Impact
Untrusted serialized data is processed by a deserializer that can instantiate arbitrary objects or execute code as a side effect. Typical impact: arbitrary code execution or logic abuse.
CVE-2026-43867 has a CVSS score of 9.8 (Critical). The vector is network-reachable, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (4.18.3, 4.21.0); upgrading removes the vulnerable code path.
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
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org.apache.camel:camel-pqc to 4.18.3 or later; org.apache.camel:camel-pqc to 4.21.0 or later
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Frequently Asked Questions
- What is CVE-2026-43867? CVE-2026-43867 is a critical-severity insecure deserialization vulnerability in org.apache.camel:camel-pqc (maven), affecting versions >= 4.18.0, < 4.18.3. It is fixed in 4.18.3, 4.21.0. Untrusted serialized data is processed by a deserializer that can instantiate arbitrary objects or execute code as a side effect.
- How severe is CVE-2026-43867? CVE-2026-43867 has a CVSS score of 9.8 (Critical). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
- Which versions of org.apache.camel:camel-pqc are affected by CVE-2026-43867? org.apache.camel:camel-pqc (maven) versions >= 4.18.0, < 4.18.3 is affected.
- Is there a fix for CVE-2026-43867? Yes. CVE-2026-43867 is fixed in 4.18.3, 4.21.0. Upgrade to this version or later.
- Is CVE-2026-43867 exploitable, and should I be worried? Whether CVE-2026-43867 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether CVE-2026-43867 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix CVE-2026-43867?
- Upgrade
org.apache.camel:camel-pqcto 4.18.3 or later - Upgrade
org.apache.camel:camel-pqcto 4.21.0 or later
- Upgrade