Skip to content

chore(deps): update module go.opentelemetry.io/otel to v1.41.0 [security]#1097

Open
tagoro9-renovatebot[bot] wants to merge 2 commits intomainfrom
c/renovate_go-go.opentelemetry.io-otel-vulnerability
Open

chore(deps): update module go.opentelemetry.io/otel to v1.41.0 [security]#1097
tagoro9-renovatebot[bot] wants to merge 2 commits intomainfrom
c/renovate_go-go.opentelemetry.io-otel-vulnerability

Conversation

@tagoro9-renovatebot
Copy link
Copy Markdown
Contributor

@tagoro9-renovatebot tagoro9-renovatebot Bot commented Apr 25, 2026

This PR contains the following updates:

Package Change Age Confidence
go.opentelemetry.io/otel v1.37.0 -> v1.41.0 age confidence

GitHub Vulnerability Alerts

CVE-2026-29181

multi-value baggage: header extraction parses each header field-value independently and aggregates members across values. this allows an attacker to amplify cpu and allocations by sending many baggage: header lines, even when each individual value is within the 8192-byte per-value parse limit.

severity

HIGH (availability / remote request amplification)

relevant links

vulnerability details

pins: open-telemetry/opentelemetry-go@1ee4a41
as-of: 2026-02-04
policy: direct (no program scope provided)

callsite: propagation/baggage.go:58 (extractMultiBaggage)
attacker control: inbound HTTP request headers (many baggage field-values) → propagation.HeaderCarrier.Values("baggage") → repeated baggage.Parse + member aggregation

root cause

extractMultiBaggage iterates over all baggage header field-values and parses each one independently, then appends members into a shared slice. the 8192-byte parsing cap applies per header value, but the multi-value path repeats that work once per header line (bounded only by the server/proxy header byte limit).

impact

in a default net/http configuration (max header bytes 1mb), a single request with many baggage: header field-values can cause large per-request allocations and increased latency.

example from the attached PoC harness (darwin/arm64; 80 values; 40 requests):

  • canonical: per_req_alloc_bytes=10315458 and p95_ms=7
  • control: per_req_alloc_bytes=133429 and p95_ms=0

proof of concept

canonical:

mkdir -p poc
unzip poc.zip -d poc
cd poc
make test

output (excerpt):

[CALLSITE_HIT]: propagation/baggage.go:58 extractMultiBaggage
[PROOF_MARKER]: baggage_multi_value_amplification p95_ms=7 per_req_alloc_bytes=10315458 per_req_allocs=16165

control:

cd poc
make control

control output (excerpt):

[NC_MARKER]: baggage_single_value_baseline p95_ms=0 per_req_alloc_bytes=133429 per_req_allocs=480

expected: multiple baggage header field-values should be semantically equivalent to a single comma-joined baggage value and should not multiply parsing/alloc work within the effective header byte budget.
actual: multiple baggage header field-values trigger repeated parsing and member aggregation, causing high per-request allocations and increased latency even when each individual value is within 8192 bytes.

fix recommendation

avoid repeated parsing across multi-values by enforcing a global budget and/or normalizing multi-values into a single value before parsing. one mitigation approach is to treat multi-values as a single comma-joined string and cap total parsed bytes (for example 8192 bytes total).

fix accepted when: under the default PoC harness settings, canonical stays within 2x of control for per_req_alloc_bytes and per_req_allocs, and p95_ms stays below 2ms.

poc.zip
PR_DESCRIPTION.md

Release Notes

open-telemetry/opentelemetry-go (go.opentelemetry.io/otel)

v1.41.0: /v0.63.0/v0.17.0/v0.0.15

Compare Source

This release is the last to support Go 1.24. The next release will require at least Go 1.25.

Added
Fixed
  • Update Baggage in go.opentelemetry.io/otel/propagation and Parse and New in go.opentelemetry.io/otel/baggage to comply with W3C Baggage specification limits. New and Parse now return partial baggage along with an error when limits are exceeded. Errors from baggage extraction are reported to the global error handler. (#​7880)

What's Changed

New Contributors

Full Changelog: open-telemetry/opentelemetry-go@v1.40.0...v1.41.0

v1.40.0

Compare Source

Added
  • Add go.opentelemetry.io/otel/semconv/v1.40.0 package.
    The package contains semantic conventions from the v1.40.0 version of the OpenTelemetry Semantic Conventions.
    See the migration documentation for information on how to upgrade from go.opentelemetry.io/otel/semconv/v1.39.0. (#​7985)
  • Add Err and SetErr on Record in go.opentelemetry.io/otel/log to attach an error and set record exception attributes in go.opentelemetry.io/otel/log/sdk. (#​7924)
Changed
  • TracerProvider.ForceFlush in go.opentelemetry.io/otel/sdk/trace joins errors together and continues iteration through SpanProcessors as opposed to returning the first encountered error without attempting exports on subsequent SpanProcessors. (#​7856)
Fixed
  • Fix missing request.GetBody in go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp to correctly handle HTTP2 GOAWAY frame. (#​7931)
  • Fix semconv v1.39.0 generated metric helpers skipping required attributes when extra attributes were empty. (#​7964)
  • Preserve W3C TraceFlags bitmask (including the random Trace ID flag) during trace context extraction and injection in go.opentelemetry.io/otel/propagation. (#​7834)
Removed
  • Drop support for [Go 1.24]. (#​7984)

v1.39.0

Compare Source

Added
  • Add go.opentelemetry.io/otel/semconv/v1.40.0 package.
    The package contains semantic conventions from the v1.40.0 version of the OpenTelemetry Semantic Conventions.
    See the migration documentation for information on how to upgrade from go.opentelemetry.io/otel/semconv/v1.39.0. (#​7985)
  • Add Err and SetErr on Record in go.opentelemetry.io/otel/log to attach an error and set record exception attributes in go.opentelemetry.io/otel/log/sdk. (#​7924)
Changed
  • TracerProvider.ForceFlush in go.opentelemetry.io/otel/sdk/trace joins errors together and continues iteration through SpanProcessors as opposed to returning the first encountered error without attempting exports on subsequent SpanProcessors. (#​7856)
Fixed
  • Fix missing request.GetBody in go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp to correctly handle HTTP2 GOAWAY frame. (#​7931)
  • Fix semconv v1.39.0 generated metric helpers skipping required attributes when extra attributes were empty. (#​7964)
  • Preserve W3C TraceFlags bitmask (including the random Trace ID flag) during trace context extraction and injection in go.opentelemetry.io/otel/propagation. (#​7834)
Removed
  • Drop support for [Go 1.24]. (#​7984)

v1.38.0

Compare Source

Added
  • Add AlwaysRecord sampler in go.opentelemetry.io/otel/sdk/trace. (#​7724)
  • Add Enabled method to all synchronous instrument interfaces (Float64Counter, Float64UpDownCounter, Float64Histogram, Float64Gauge, Int64Counter, Int64UpDownCounter, Int64Histogram, Int64Gauge,) in go.opentelemetry.io/otel/metric.
    This stabilizes the synchronous instrument enabled feature, allowing users to check if an instrument will process measurements before performing computationally expensive operations. (#​7763)
  • Add go.opentelemetry.io/otel/semconv/v1.39.0 package.
    The package contains semantic conventions from the v1.39.0 version of the OpenTelemetry Semantic Conventions.
    See the migration documentation for information on how to upgrade from go.opentelemetry.io/otel/semconv/v1.38.0. (#​7783, #​7789)
Changed
  • Improve the concurrent performance of HistogramReservoir in go.opentelemetry.io/otel/sdk/metric/exemplar by 4x. (#​7443)
  • Improve the concurrent performance of FixedSizeReservoir in go.opentelemetry.io/otel/sdk/metric/exemplar. (#​7447)
  • Improve performance of concurrent histogram measurements in go.opentelemetry.io/otel/sdk/metric. (#​7474)
  • Improve performance of concurrent synchronous gauge measurements in go.opentelemetry.io/otel/sdk/metric. (#​7478)
  • Add experimental observability metrics in go.opentelemetry.io/otel/exporters/stdout/stdoutmetric. (#​7492)
  • Exporter in go.opentelemetry.io/otel/exporters/prometheus ignores metrics with the scope go.opentelemetry.io/contrib/bridges/prometheus.
    This prevents scrape failures when the Prometheus exporter is misconfigured to get data from the Prometheus bridge. (#​7688)
  • Improve performance of concurrent exponential histogram measurements in go.opentelemetry.io/otel/sdk/metric. (#​7702)
  • The rpc.grpc.status_code attribute in the experimental metrics emitted from go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc is replaced with the rpc.response.status_code attribute to align with the semantic conventions. (#​7854)
  • The rpc.grpc.status_code attribute in the experimental metrics emitted from go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc is replaced with the rpc.response.status_code attribute to align with the semantic conventions. (#​7854)
Fixed
  • Fix bad log message when key-value pairs are dropped because of key duplication in go.opentelemetry.io/otel/sdk/log. (#​7662)
  • Fix DroppedAttributes on Record in go.opentelemetry.io/otel/sdk/log to not count the non-attribute key-value pairs dropped because of key duplication. (#​7662)
  • Fix SetAttributes on Record in go.opentelemetry.io/otel/sdk/log to not log that attributes are dropped when they are actually not dropped. (#​7662)
  • Fix missing request.GetBody in go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp to correctly handle HTTP/2 GOAWAY frame. (#​7794)
  • WithHostID detector in go.opentelemetry.io/otel/sdk/resource to use full path for ioreg command on Darwin (macOS). (#​7818)
Deprecated

Configuration

📅 Schedule: Branch creation - "" (UTC), 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 has been generated by Renovate Bot.

@tagoro9-renovatebot tagoro9-renovatebot Bot added dependencies Pull requests that update a dependency file security Pull requests that address a security vulnerability labels Apr 25, 2026
@tagoro9-renovatebot
Copy link
Copy Markdown
Contributor Author

tagoro9-renovatebot Bot commented Apr 25, 2026

ℹ 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):

  • 3 additional dependencies were updated

Details:

Package Change
go.opentelemetry.io/auto/sdk v1.1.0 -> v1.2.1
go.opentelemetry.io/otel/metric v1.37.0 -> v1.41.0
go.opentelemetry.io/otel/trace v1.37.0 -> v1.41.0

@tagoro9-renovatebot tagoro9-renovatebot Bot added dependencies Pull requests that update a dependency file security Pull requests that address a security vulnerability labels Apr 25, 2026
@github-actions
Copy link
Copy Markdown
Contributor

github-actions Bot commented Apr 25, 2026

Release notes preview

No new release will be created.

If you are expecting a release, you will need to either fix a bug or add a feature.
Chores, CI, docs, refactoring, style and other changes will not trigger a release.

@tagoro9-renovatebot tagoro9-renovatebot Bot force-pushed the c/renovate_go-go.opentelemetry.io-otel-vulnerability branch from b612e09 to 860a2c6 Compare April 28, 2026 01:04
@tagoro9-renovatebot tagoro9-renovatebot Bot force-pushed the c/renovate_go-go.opentelemetry.io-otel-vulnerability branch from 510f094 to 9c498a2 Compare May 5, 2026 01:01
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

dependencies Pull requests that update a dependency file security Pull requests that address a security vulnerability

Projects

None yet

Milestone

No milestone

Development

Successfully merging this pull request may close these issues.

0 participants