{"id":"GHSA-88hf-wf7h-7w4m","summary":"OpenTelemetry's Zipkin remote endpoint cache could grow without bounds and increase memory pressure","details":"### Summary\n\nThe Zipkin exporter remote endpoint cache accepted unbounded key growth derived from span attributes. In high-cardinality scenarios, this could increase process memory usage over time and degrade availability.\n\n### Details\n\n- Introduce a bounded, thread-safe LRU cache for remote endpoints.\n- Enforce fixed maximum size to prevent unbounded growth.\n\n### Impact\n\n- A process using Zipkin export for client/producer spans could experience avoidable memory growth under sustained unique remote endpoint values.\n\n### Resources\n\n[#7081](https://github.com/open-telemetry/opentelemetry-dotnet/pull/7081)","aliases":["CVE-2026-41310"],"modified":"2026-05-08T19:51:02.960137Z","published":"2026-04-28T23:23:28Z","database_specific":{"cwe_ids":["CWE-400","CWE-770"],"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"2026-04-28T23:23:28Z","nvd_published_at":"2026-05-06T22:16:25Z"},"references":[{"type":"WEB","url":"https://github.com/open-telemetry/opentelemetry-dotnet/security/advisories/GHSA-88hf-wf7h-7w4m"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-41310"},{"type":"WEB","url":"https://github.com/open-telemetry/opentelemetry-dotnet/pull/7081"},{"type":"WEB","url":"https://github.com/open-telemetry/opentelemetry-dotnet/commit/c724f4bd6fd88e9a599af1668bf7af9487155b62"},{"type":"PACKAGE","url":"https://github.com/open-telemetry/opentelemetry-dotnet"}],"affected":[{"package":{"name":"OpenTelemetry.Exporter.Zipkin","ecosystem":"NuGet","purl":"pkg:nuget/OpenTelemetry.Exporter.Zipkin"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.15.3"}]}],"versions":["1.0.0-rc2","1.0.0-rc3","1.0.0-rc4","1.0.1","1.1.0","1.1.0-beta1","1.1.0-beta2","1.1.0-beta3","1.1.0-beta4","1.1.0-rc1","1.10.0","1.11.0","1.11.1","1.11.2","1.12.0","1.13.0","1.13.1","1.14.0","1.15.0","1.15.1","1.15.2","1.2.0","1.2.0-alpha2","1.2.0-alpha3","1.2.0-alpha4","1.2.0-beta1","1.2.0-rc1","1.2.0-rc2","1.2.0-rc3","1.2.0-rc4","1.2.0-rc5","1.3.0","1.3.1","1.3.2","1.4.0","1.5.0","1.5.1","1.6.0","1.7.0","1.8.0","1.8.1","1.9.0"],"database_specific":{"last_known_affected_version_range":"\u003c= 1.15.2","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-88hf-wf7h-7w4m/GHSA-88hf-wf7h-7w4m.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"}]}