What’s Vulnerable › Vulnerabilities

CVE-2026-45682: OpenTelemetry eBPF Instrumentation: CappedConcurrentHashMap leaks keys after removals

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-06-02 · updated 2026-07-22
• Weakness: CWE-401

Description

OpenTelemetry eBPF Instrumentation provides eBPF instrumentation based on the OpenTelemetry standard. Prior to version 0.9.0, the custom CappedConcurrentHashMap introduced for Java TLS state tracking never removes keys from its insertion-order queue when entries are deleted. In long-running instrumented JVMs, repeated connection churn can therefore grow the queue without bound and exhaust heap memory. This issue has been patched in version 0.9.0.

Affected products

• open-telemetry opentelemetry-ebpf-instrumentation: before 0.9.0 — fixed in 0.9.0

How to fix

Upgrade to a fixed version: open-telemetry opentelemetry-ebpf-instrumentation 0.9.0. Check the vendor advisory for mitigations.

References

• https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation/releases/tag/v0.9.0
• https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation/security/advisories/GHSA-962q-hwm5-52x5
• https://github.com/open-telemetry/opentelemetry-ebpf-instrumentation/security/advisories/GHSA-962q-hwm5-52x5

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