{"id":"CVE-2026-116694","revision":null,"records":[{"revision":"ead12462180440009aab049a022d444b","observedAt":"2026-10-28T17:46:48.824+00:00","statement":{"source":"cve-program","id":"CVE-2026-116694","aliases":[],"title":"OpenTelemetry Python: Unbounded memory allocation in Jaeger baggage propagation","description":"OpenTelemetry Python provides the Python API and SDK for OpenTelemetry. Prior to 1.45.0, JaegerPropagator.extract() in opentelemetry-propagator-jaeger processes inbound uberctx-* baggage values without entry, per-entry byte, or total-byte limits. Services that enable the optional Jaeger propagator can perform unnecessary CPU work and short-lived heap allocations when an untrusted carrier supplies numerous or oversized values, contributing to denial of service when transport-level limits do not constrain the input. Common default Python HTTP server limits reduce the practical impact, while custom getters, non-HTTP transports, or raised header limits increase exposure. This issue is fixed in version 1.45.0.","state":0,"publishedAt":"2026-10-27T20:09:06.484+00:00","modifiedAt":"2026-10-28T16:13:25.34+00:00","affected":[{"ecosystem":"Vendor product","name":"opentelemetry-python","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"open-telemetry\",\n                    \"product\": \"opentelemetry-python\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 1.45.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","score":6.3,"severity":"MEDIUM"}],"references":["https://github.com/open-telemetry/opentelemetry-python/security/advisories/GHSA-f5m9-jfrj-jjj7","https://github.com/open-telemetry/opentelemetry-python/pull/5556","https://github.com/open-telemetry/opentelemetry-python/commit/65c4eeb87cd3815dc795d3b5485e9ea0d5affcc7","https://github.com/open-telemetry/opentelemetry-python/releases/tag/v1.45.0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-116694","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-116694","identifiers":["CVE-2026-116694"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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