1sealsemantic last-mile verification

Research / Finding

OTLP HTTP exporters read unbounded HTTP response bodies

F-OTELGO-002

Public snapshot: 26 Sep 2026. Status, releases and attribution belong to each source below; none is inferred from another record.

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Recorded evidence

5.3medium
CVE-2026-39882CVEopen-telemetry/opentelemetry-go

OTLP HTTP exporters read unbounded HTTP response bodies

Upstream fixed versions: go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp: v1.43.0; go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp: v1.43.0; go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp: v0.19.0

patched
details
Finding IDs
F-OTELGO-002
CVE
CVE-2026-39882
GHSA
GHSA-w8rr-5gcm-pp58
Status
patched
Fixed in
go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp: v1.43.0; go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp: v1.43.0; go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp: v0.19.0
Note
GHSA-w8rr-5gcm-pp58
CVSS vector
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CVE registry state
PUBLISHED
CVE state checked
CVSS assessment
OpenTelemetry (repository advisory); v3.1; 5.3; observed 2026-09-24
Upstream title
OTLP HTTP exporters read unbounded HTTP response bodies
Upstream CWE
CWE-789
Upstream publication
Upstream updated
Metadata fetched
Upstream fixed versions
go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp: v1.43.0; go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp: v1.43.0; go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp: v0.19.0
Upstream affected ranges
go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp: < v1.43.0; go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp: < v1.43.0; go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp: < v0.19.0
Upstream @1seal credit
@1seal: reporter (accepted)

F-OTELGO-002: Resource limits. Exporter response bodies are read without an effective bound. Reviewed 24 Sep 2026. Mechanism assessed by 1seal.

Mechanism source for F-OTELGO-002

Security area (1seal assessment): Availability. An untrusted collector response can trigger unbounded buffering and exhaust exporter memory. Reviewed 21 Sep 2026.

5.3medium
CVE-2026-40182CVEopen-telemetry/opentelemetry-dotnet

OTLP exporter reads unbounded HTTP response bodies

Fixed in: 1.15.2

patched
details
Finding IDs
F-OTELGO-002
CVE
CVE-2026-40182
GHSA
GHSA-q834-8qmm-v933
Status
patched
Fixed in
1.15.2
Recorded credit
reporter: @1seal
Note
GHSA-q834-8qmm-v933 · surfaced during investigation of GHSA-w8rr-5gcm-pp58
CVSS vector
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CVE registry state
PUBLISHED
CVE state checked
Upstream title
OTLP exporter reads unbounded HTTP response bodies
Upstream CWE
CWE-789
Upstream publication
Upstream updated
Metadata fetched
Upstream @1seal credit
@1seal: reporter (accepted)

F-OTELGO-002: Resource limits. Exporter response bodies are read without an effective bound. Reviewed 24 Sep 2026. Mechanism assessed by 1seal.

Mechanism source for F-OTELGO-002

Security area (1seal assessment): Availability. OTLP error responses are buffered without a size limit, allowing a malicious collector to exhaust application memory. Reviewed 21 Sep 2026.

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How this page groups evidence

This identifier groups recorded evidence; it is not an additional CVE, independent-vulnerability count or guarantee of vendor confirmation. Fixed code, released versions, attribution and independent discovery are distinct claims. Absent metadata means not recorded, not disproved. Counting rules.