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CVE-2026-41178

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

Published: Jun 4, 2026Updated: Jun 4, 2026 Sources: CVE List NVD
NVD MITRE
5.3CVSS
MEDIUM

OpenTelemetry-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.

EPSS Score
0.1%
Top 83.5%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:LAvailability
Low

Weaknesses

CWE-789

Affected Products

go.opentelemetry.io/otel/baggage
open-telemetry
OSS Libraries / generic-library
go.opentelemetry.io/otel/propagation
open-telemetry
OSS Libraries / generic-library
open-telemetryoss-projectOSS Librariesaka opentelemetry

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

References

https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-5wrp-cwcj-q835
github.com
https://github.com/open-telemetry/opentelemetry-go/pull/7880
github.com

Timeline

Published
Jun 4, 2026
Last Updated
Jun 4, 2026

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