Skip to content

build(deps): update module go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp to v1.43.0 [security]#6314

Merged
renovate[bot] merged 1 commit intomainfrom
renovate/go-go.opentelemetry.io-otel-exporters-otlp-otlptrace-otlptracehttp-vulnerability
Apr 9, 2026
Merged

build(deps): update module go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp to v1.43.0 [security]#6314
renovate[bot] merged 1 commit intomainfrom
renovate/go-go.opentelemetry.io-otel-exporters-otlp-otlptrace-otlptracehttp-vulnerability

Conversation

@renovate
Copy link
Copy Markdown
Contributor

@renovate renovate bot commented Apr 8, 2026

This PR contains the following updates:

Package Change Age Confidence
go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.42.0 → v1.43.0 age confidence

GitHub Vulnerability Alerts

CVE-2026-39882

overview:
this report shows that 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).

severity

HIGH

not claiming: this is a remote dos against every default deployment.
claiming: if the exporter sends traces to an untrusted collector endpoint (or over a network segment where mitm is realistic), that endpoint can crash the process via a large response body.

callsite (pinned):

  • exporters/otlp/otlptrace/otlptracehttp/client.go:199
  • exporters/otlp/otlptrace/otlptracehttp/client.go:230
  • exporters/otlp/otlpmetric/otlpmetrichttp/client.go:170
  • exporters/otlp/otlpmetric/otlpmetrichttp/client.go:201
  • exporters/otlp/otlplog/otlploghttp/client.go:190
  • exporters/otlp/otlplog/otlploghttp/client.go:221

permalinks (pinned):

root cause:
each exporter client reads resp.Body using io.Copy(&respData, resp.Body) into a bytes.Buffer on both success and error paths, with no upper bound.

impact:
a malicious collector can force large transient heap allocations during export (peak memory scales with attacker-chosen response size) and can potentially crash the instrumented process (oom).

affected component:

  • go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp
  • go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp
  • go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp

repro (local-only):

unzip poc.zip -d poc
cd poc
make canonical resp_bytes=33554432 chunk_delay_ms=0

expected output contains:

[CALLSITE_HIT]: otlptracehttp.UploadTraces::io.Copy(resp.Body)
[PROOF_MARKER]: resp_bytes=33554432 peak_alloc_bytes=118050512

control (same env, patched target):

unzip poc.zip -d poc
cd poc
make control resp_bytes=33554432 chunk_delay_ms=0

expected control output contains:

[CALLSITE_HIT]: otlptracehttp.UploadTraces::io.Copy(resp.Body)
[NC_MARKER]: resp_bytes=33554432 peak_alloc_bytes=512232

attachments: poc.zip (attached)

PR_DESCRIPTION.md

attack_scenario.md

poc.zip

Fixed in: https://github.com/open-telemetry/opentelemetry-go/pull/8108

Release Notes

open-telemetry/opentelemetry-go (go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp)

v1.43.0: /v0.65.0/v0.19.0

Compare Source

Added

  • Add IsRandom and WithRandom on TraceFlags, and IsRandom on SpanContext in go.opentelemetry.io/otel/trace
    for W3C Trace Context Level 2 Random Trace ID Flag support. (#​8012)
  • Add service detection with WithService in go.opentelemetry.io/otel/sdk/resource. (#​7642)
  • Add DefaultWithContext and EnvironmentWithContext in go.opentelemetry.io/otel/sdk/resource to support plumbing context.Context through default and environment detectors. (#​8051)
  • Support attributes with empty value (attribute.EMPTY) in go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc. (#​8038)
  • Support attributes with empty value (attribute.EMPTY) in go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc. (#​8038)
  • Support attributes with empty value (attribute.EMPTY) in go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc. (#​8038)
  • Support attributes with empty value (attribute.EMPTY) in go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp. (#​8038)
  • Support attributes with empty value (attribute.EMPTY) in go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp. (#​8038)
  • Support attributes with empty value (attribute.EMPTY) in go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp. (#​8038)
  • Support attributes with empty value (attribute.EMPTY) in go.opentelemetry.io/otel/sdk/metric/metricdata/metricdatatest. (#​8038)
  • Add support for per-series start time tracking for cumulative metrics in go.opentelemetry.io/otel/sdk/metric.
    Set OTEL_GO_X_PER_SERIES_START_TIMESTAMPS=true to enable. (#​8060)
  • Add WithCardinalityLimitSelector for metric reader for configuring cardinality limits specific to the instrument kind. (#​7855)

Changed

  • Introduce the EMPTY Type in go.opentelemetry.io/otel/attribute to reflect that an empty value is now a valid value, with INVALID remaining as a deprecated alias of EMPTY. (#​8038)
  • Refactor slice handling in go.opentelemetry.io/otel/attribute to optimize short slice values with fixed-size fast paths. (#​8039)
  • Improve performance of span metric recording in go.opentelemetry.io/otel/sdk/trace by returning early if self-observability is not enabled. (#​8067)
  • Improve formatting of metric data diffs in go.opentelemetry.io/otel/sdk/metric/metricdata/metricdatatest. (#​8073)

Deprecated

  • Deprecate INVALID in go.opentelemetry.io/otel/attribute. Use EMPTY instead. (#​8038)

Fixed

  • Return spec-compliant TraceIdRatioBased description. This is a breaking behavioral change, but it is necessary to
    make the implementation spec-compliant. (#​8027)
  • Fix a race condition in go.opentelemetry.io/otel/sdk/metric where the lastvalue aggregation could collect the value 0 even when no zero-value measurements were recorded. (#​8056)
  • Limit HTTP response body to 4 MiB in go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp to mitigate excessive memory usage caused by a misconfigured or malicious server.
    Responses exceeding the limit are treated as non-retryable errors. (#​8108)
  • Limit HTTP response body to 4 MiB in go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp to mitigate excessive memory usage caused by a misconfigured or malicious server.
    Responses exceeding the limit are treated as non-retryable errors. (#​8108)
  • Limit HTTP response body to 4 MiB in go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp to mitigate excessive memory usage caused by a misconfigured or malicious server.
    Responses exceeding the limit are treated as non-retryable errors. (#​8108)
  • WithHostID detector in go.opentelemetry.io/otel/sdk/resource to use full path for kenv command on BSD. (#​8113)
  • Fix missing request.GetBody in go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp to correctly handle HTTP2 GOAWAY frame. (#​8096)

What's Changed

New Contributors

Full Changelog: open-telemetry/opentelemetry-go@v1.42.0...v1.43.0

Configuration

📅 Schedule: (UTC)

  • Branch creation
    • ""
  • Automerge
    • At any time (no schedule defined)

🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

  • If you want to rebase/retry this PR, check this box

This PR was generated by Mend Renovate. View the repository job log.

@renovate renovate bot enabled auto-merge (squash) April 8, 2026 23:07
@renovate
Copy link
Copy Markdown
Contributor Author

renovate bot commented Apr 8, 2026 •
edited
Loading

ℹ️ Artifact update notice

File name: go.mod

In order to perform the update(s) described in the table above, Renovate ran the go get command, which resulted in the following additional change(s):

  • 5 additional dependencies were updated

Details:

Package Change
go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.42.0 -> v1.43.0
google.golang.org/genproto/googleapis/api v0.0.0-20260316180232-0b37fe3546d5 -> v0.0.0-20260401024825-9d38bb4040a9
google.golang.org/grpc v1.79.3 -> v1.80.0
github.com/GoogleCloudPlatform/opentelemetry-operations-go/detectors/gcp v1.30.0 -> v1.31.0
google.golang.org/genproto/googleapis/rpc v0.0.0-20260319201613-d00831a3d3e7 -> v0.0.0-20260401024825-9d38bb4040a9

@alwaysmeticulous
Copy link
Copy Markdown

alwaysmeticulous bot commented Apr 8, 2026 •
edited
Loading

✅ Meticulous spotted 0 visual differences across 274 screens tested: view results.

Meticulous evaluated ~4 hours of user flows against your PR.

Expected differences? Click here. Last updated for commit 140e9bf build(deps): update module go.opentelemetry.io/otel/exporters/otlp/otlpt.... This comment will update as new commits are pushed.

@renovate renovate bot force-pushed the renovate/go-go.opentelemetry.io-otel-exporters-otlp-otlptrace-otlptracehttp-vulnerability branch from d9f21b3 to 5a2aa7e Compare April 9, 2026 01:14
@renovate renovate bot force-pushed the renovate/go-go.opentelemetry.io-otel-exporters-otlp-otlptrace-otlptracehttp-vulnerability branch from 5a2aa7e to 140e9bf Compare April 9, 2026 05:07
@renovate renovate bot merged commit c251eda into main Apr 9, 2026
35 checks passed
@renovate renovate bot deleted the renovate/go-go.opentelemetry.io-otel-exporters-otlp-otlptrace-otlptracehttp-vulnerability branch April 9, 2026 09:47
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Reviewers

No reviews

Assignees

No one assigned

Labels

None yet

Projects

None yet

Milestone

No milestone

Development

Successfully merging this pull request may close these issues.

0 participants