CVE-2026-41178

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

MEDIUM
5.3
CVSS Score
Published: June 4, 2026 at 02:38 PM UTC
Updated: July 22, 2026 at 08:24 PM UTC
2 products affected across 1 vendorOpentelemetryOpenTelemetry Go

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.3%
SSVC
PoC

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 1.42.01.43.0
Affected range stops below 1.42.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (2)

x_refsource_CONFIRMIssue TrackingPatchVendor Advisory
Source: cverecord
https://github.com/open-telemetry/opentelemetry-go/security/advisories/GHSA-5wrp-cwcj-q835
x_refsource_MISCIssue TrackingPatch
Source: cverecord
https://github.com/open-telemetry/opentelemetry-go/pull/7880

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Vector?

Quick Info

StatusANALYZED
CWE
CWE-789

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