CVE-2026-128086

Name	CVE-2026-128086
Description	OpenTelemetry-Go is the Go implementation of OpenTelemetry. From version 1.0.0-RC1 until version 1.47.0, baggage.Parse and propagation.Baggage.Extract eagerly materialize every W3C baggage property through parseMember, grow property slices, serialize members, and copy properties into internal/baggage.Item. A valid densely populated baggage header can therefore cause allocation traffic and retained memory disproportionate to its bounded input size. Remote impact requires baggage extraction to be enabled, attacker-controlled input to reach it, and extraction to run before authentication or on a public route; the evidence establishes increased allocation and garbage-collection pressure but not reliable process termination. This issue is fixed in version 1.47.0.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
golang-opentelemetry-otel (PTS)	bookworm	1.1.0-2	vulnerable
	trixie	1.31.0-4	vulnerable
	forky, sid	1.46.0-3	vulnerable

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
golang-opentelemetry-otel	source	(unstable)	(unfixed)

Notes

https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-rrfc-gjm9-cgrj
https://github.com/open-telemetry/opentelemetry-go/pull/9024
https://github.com/open-telemetry/opentelemetry-go/commit/f09d1de32f4ac7e5ef16394533721106b1a57b89 (v1.47.0)