{"id":"CVE-2026-116694","summary":"OpenTelemetry Python: Unbounded memory allocation in Jaeger baggage propagation","details":"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.","aliases":["GHSA-f5m9-jfrj-jjj7"],"modified":"2026-10-29T02:48:30.053409042Z","published":"2026-10-27T20:09:06.484Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-770"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/116xxx/CVE-2026-116694.json"},"references":[{"type":"WEB","url":"https://github.com/open-telemetry/opentelemetry-python/releases/tag/v1.45.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/116xxx/CVE-2026-116694.json"},{"type":"ADVISORY","url":"https://github.com/open-telemetry/opentelemetry-python/security/advisories/GHSA-f5m9-jfrj-jjj7"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-116694"},{"type":"FIX","url":"https://github.com/open-telemetry/opentelemetry-python/commit/65c4eeb87cd3815dc795d3b5485e9ea0d5affcc7"},{"type":"FIX","url":"https://github.com/open-telemetry/opentelemetry-python/pull/5556"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/open-telemetry/opentelemetry-python","events":[{"introduced":"0"},{"fixed":"4f0fcfa53e53a8c654a34df0d0a1fd74483ebca2"},{"fixed":"65c4eeb87cd3815dc795d3b5485e9ea0d5affcc7"}],"database_specific":{"extracted_events":[{"source":"AFFECTED_FIELD","strategy":"StringRangeExpression","range":[{"introduced":"0"},{"fixed":"1.45.0"}]},{"source":"REFERENCES_COMMIT","range":[{"fixed":"65c4eeb87cd3815dc795d3b5485e9ea0d5affcc7"}]},{"original_tag":"v1.45.0","range":[{"fixed":"4f0fcfa53e53a8c654a34df0d0a1fd74483ebca2"}],"source":"REFERENCES_TAG"}]}}],"versions":["v1.13.0","v1.12.0","v1.12.0rc2","v1.12.0rc1","v1.11.1","v1.11.0","v1.10.0","v1.9.1","v1.9.0","v1.8.0","v1.7.1","v1.7.0","v1.6.2","v1.6.1","v1.6.0","v1.5.0","v1.4.0","v1.3.0","v1.2.0","v1.0.0","v0.19b0","v0.17b0","v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-116694.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V4","score":"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"}]}