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CVE-2026-39882

OpenTelemetry-Go OTLP HTTP exporters read unbounded HTTP response bodies

Published: Apr 8, 2026Updated: Apr 9, 2026 Sources: CVE List NVD BDUCWE-789
NVD MITRE
5.3CVSSMEDIUM
EPSS Score
0.2%
Top 91.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

OpenTelemetry-Go is the Go implementation of OpenTelemetry. Prior to 1.43.0, the otlp HTTP exporters (traces/metrics/logs) read the full HTTP response body into an in-memory bytes.Buffer without a size cap. This is exploitable for memory exhaustion when the configured collector endpoint is attacker-controlled (or a network attacker can mitm the exporter connection). This vulnerability is fixed in 1.43.0.

CVSS Vector Breakdown

AV:AAC:HPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:AAttack Vector
Adjacent
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-789

Affected Products

Debian GNU/LinuxСообщество свободного программного обеспечения
On-premOS
Operating Systems / linux-distro
OpenTelemetry-Go ContribСообщество свободного программного обеспечения
On-prem
Operating Systems / linux-distro
GrafanaGrafana Labs
On-premWeb App
Enterprise Software / itsm-monitoring
opentelemetry-goopen-telemetry
Library
OSS Libraries / generic-library
opentelemetryopentelemetry
Mixed
OSS Libraries / generic-library
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf
grafana labscommercialUSEnterprise Softwareaka grafana labs
open-telemetryoss-projectOSS Librariesaka opentelemetry
opentelemetryoss-projectOSS Librariesaka opentelemetry-collector

Exploitability

Official Patch Available

References

https://security-tracker.debian.org/tracker/CVE-2026-39882
security-tracker.debian.org
https://images.chainguard.dev/directory/image/grafana/vulnerabilities
images.chainguard.dev
https://github.com/open-telemetry/opentelemetry-go/pull/8108
github.com
and 2 more references View all →

Timeline

Published
Apr 8, 2026
Last Updated
Apr 9, 2026

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