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CVE-2026-41178

23
FAUCET Score

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.

First published: Jun 4, 2026Last modified: Jun 4, 2026

Impacted Technologies

VendorProductVersion(s)CPE
< 1.42.0CPE matchmatch criteria
cpe:2.3:a:opentelemetry:opentelemetry:*:*:*:*:*:go:*:*
1.43.0CPE matchmatch criteria
cpe:2.3:a:opentelemetry:opentelemetry:1.43.0:*:*:*:*:go:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.24%
Probability of exploitation in next 30 days
EPSS Percentile
14.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0024 is in the 6th percentile among its peer group of 23,723 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

gopatch availablevia ghsa
Product: go.opentelemetry.io/otel/baggageFixed in: 1.42.0
gopatch availablevia ghsa
Product: go.opentelemetry.io/otel/propagationFixed in: 1.42.0
gopatch availablevia ghsa
Product: go.opentelemetry.io/otel/baggageFixed in: 1.44.0
gopatch availablevia ghsa
Product: go.opentelemetry.io/otel/propagationFixed in: 1.44.0

Vendor Advisories (1)

goGHSA-5wrp-cwcj-q835medium

opentelemetry-go's baggage parsing no longer caps raw header length

May 28, 2026

References

github.com / open-telemetry/opentelemetry-go/pull/7880
Issue TrackingPatch
github.com / open-telemetry/opentelemetry-go/security/advisories/GHSA-5wrp-cwcj-q835
Issue TrackingPatchVendor Advisory