Medium severity · published Jun 4, 2026
CVE-2026-41178
OpenTelemetry-Go's baggage parsing no longer caps raw header length
5.3
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 27% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GO
go.opentelemetry.io/otel/baggage · open-telemetry
= 1.41.0; = 1.43.0 · source: vendor
GO
go.opentelemetry.io/otel/propagation · open-telemetry
= 1.41.0; = 1.43.0 · source: vendor
OP
Opentelemetry · Opentelemetry
before 1.42.0; 1.43.0 · source: NVD
Affected product
GO
go.opentelemetry.io/otel/baggage
open-telemetry