Medium 5.3Published Jun 4, 2026

CVE-2026-41178OpenTelemetry-Go's baggage parsing no longer caps raw header length

Updated under an hour ago (Oct 28, 2026, 2:20 AM ET)

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It affects open-telemetry go.opentelemetry.io/otel/baggage and 2 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for open-telemetry go.opentelemetry.io/otel/baggage

Exploited in the last 30 days

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.

CVSS: 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weakness (CWE): CWE-789
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Jun 4, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

open-telemetry go.opentelemetry.io/otel/baggage open_telemetry:go.opentelemetry.io_otel_baggage (from the name)	= 1.41.0; = 1.43.0	CNA record
open-telemetry go.opentelemetry.io/otel/propagation open_telemetry:go.opentelemetry.io_otel_propagation (from the name)	= 1.41.0; = 1.43.0	CNA record
opentelemetry opentelemetry opentelemetry:opentelemetry	before 1.42.0; 1.43.0	NVD

References

References

https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-5wrp-cwcj-q835	x-refsource-confirm, issue-tracking, patch, vendor-advisory
https://github.com/open-telemetry/opentelemetry-go/pull/7880	x-refsource-misc, issue-tracking, patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.