OpenTelemetry-Go's baggage parsing no longer caps raw header length

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Summary

CVECVE-2026-41178
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-04 16:16:37 UTC
Updated2026-06-18 14:34:48 UTC
DescriptionOpenTelemetry-Go is the Go implementation of OpenTelemetry. Versions 1.41.0 and 1.43.0 removed raw-length rejection and it causes `Parse` to process arbitrarily large/invalid baggage headers and log errors, enabling DoS via oversized inputs. Versions 1.42.0 and 1.44.0 fix the issue.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS: 0.004000000 probability, percentile 0.316240000 (date 2026-06-22)

Problem Types: CWE-789 | CWE-789 CWE-789: Memory Allocation with Excessive Size Value

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
3.1CNADECLARED5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Opentelemetry Opentelemetry All All All All
Application Opentelemetry Opentelemetry 1.43.0 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Open-telemetry Go.opentelemetry.io/otel/baggage affected = 1.41.0 Not specified
CNA Open-telemetry Go.opentelemetry.io/otel/baggage affected = 1.43.0 Not specified
CNA Open-telemetry Go.opentelemetry.io/otel/propagation affected = 1.41.0 Not specified
CNA Open-telemetry Go.opentelemetry.io/otel/propagation affected = 1.43.0 Not specified

References

ReferenceSourceLinkTags
github.com/open-telemetry/opentelemetry-go/pull/7880 [email protected] github.com Issue Tracking, Patch
github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-5wrp... 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com Issue Tracking, Patch, Vendor Advisory
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