CVE-2026-116694

UNKNOWN 0.0

OpenTelemetry Python: Unbounded memory allocation in Jaeger baggage propagation

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-770
Vendor	open-telemetry
Product	opentelemetry-python
Published	Oct 27, 2026

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Affected Versions

open-telemetry / opentelemetry-python

< 1.45.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/open-telemetry/opentelemetry-python/security/advisories/GHSA-f5m9-jfrj-jjj7 github.com: https://github.com/open-telemetry/opentelemetry-python/pull/5556 github.com: https://github.com/open-telemetry/opentelemetry-python/commit/65c4eeb87cd3815dc795d3b5485e9ea0d5affcc7 github.com: https://github.com/open-telemetry/opentelemetry-python/releases/tag/v1.45.0