chore(deps): bump google.golang.org/grpc from 1.79.3 to 1.82.1

[dependabot]

Bumps google.golang.org/grpc from 1.79.3 to 1.82.1.

Release notes

Sourced from google.golang.org/grpc's releases.

Release 1.82.1

Security

• server: Stop reading from the connection when flooded by HTTP/2 frames. The default value for this limit is 100 frames, excluding DATA and HEADERS, and may be changed by setting environment variable GRPC_GO_EXPERIMENTAL_CONTROL_BUFFER_THROTTLE_LIMIT.
• xds/rbac: Support Metadata and RequestedServerName permissions matcher fields. If present in a DENY rule, previously these would be ignored and fail-open.
• xds/rbac: Fix panic when parsing unsupported fields in NotRule/NotId permissions.
• xds/rbac: Support the deprecated source_ip principal identifier by treating it as equivalent to direct_remote_ip.

Release 1.82.0

Behavior Changes

• server: Remove support for GRPC_GO_EXPERIMENTAL_DISABLE_STRICT_PATH_CHECKING environment varibale. Strict incoming RPC path validation (which has been the default since v1.79.3) can no longer be disabled. (#9112)
• transport: Add environment variable to change the default max header list size from 16MB to 8KB. This may be enabled by setting GRPC_GO_EXPERIMENTAL_ENABLE_8KB_DEFAULT_HEADER_LIST_SIZE=true. This will be enabled by default in a subsequent release. (#9019)
• balancer: Load Balancing policy registry is now case-sensitive. Set GRPC_GO_EXPERIMENTAL_CASE_SENSITIVE_BALANCER_REGISTRIES=false (and file an issue) to revert to case-insensitive behavior. (#9017)

New Features

• experimental/stats: Expose a new API, NewContextWithLabelCallback, to register a callback that is invoked when telemetry labels are added. (#8877)
  • Special Thanks: @​seth-epps
• client: Return a portion of the response body in the error message, when the client receives an unexpected non-gRPC HTTP response, to make debugging easier. (#8929)
  • Special Thanks: @​chengxilo
• server: Add environment variable GRPC_GO_SERVER_GOROUTINE_LABELS that controls setting runtime/pprof.Labels on goroutines spawned by the server. Set GRPC_GO_SERVER_GOROUTINE_LABELS=grpc.method=true to add the grpc.method label on goroutines spawned to handle incoming requests. (#9082)
  • Special Thanks: @​dfinkel

Bug Fixes

• xds/server: Fix a memory leak of HTTP filter instances occurring when route configurations are updated in-place during a Route Discovery Service (RDS) update. (#9138)
• grpc: In the deprecated gzip Compressor (used via the deprecated WithCompressor dial option), enforce the MaxRecvMsgSize limit on the decompressed message buffer, preventing excessive memory allocation from highly compressed payloads. (#9114)
  • Special Thanks: @​evilgensec
• stats/opentelemetry: Record retry attempts, grpc.previous-rpc-attempts, at the call level and not the attempt level. (#8923)
• encoding: Ensure Close() is always called on readers returned from Compressor.Decompress if possible. (#9135)
• channelz: Fix the LastMessageSentTimestamp and LastMessageReceivedTimestamp fields in SocketMetrics to ensure they contain correct timestamp values. (#9109)

Release 1.81.1

Security

• xds/rbac: Fix a potential authorization bypass caused by incorrectly falling through URI/DNS SANs to Subject Distinguished Name (DN) when matching the authenticated principal name. With this fix, only the first non-empty identity source will be used, as per gRFC A41. (#9111)
  • Special Thanks: @​al4an444

Bug Fixes

• otel: Segregate client and server RPC information used for metrics and traces, to avoid one overwriting the other. (#9081)

Release 1.81.0

Behavior Changes

• balancer/rls: Switch gauge metrics to asynchronous emission (once per collection cycle) to reduce telemetry noise and align with other gRPC language implementations. (#8808)

Dependencies

... (truncated)

Commits

• ebd8f06 Change version to 1.82.1 (#9238)
• 4ea465d Cherry-pick commits (#9236)
• 9494a2c Change version to 1.82.1-dev (#9171)
• bd23985 Change version to 1.82.0 (#9170)
• 0f3086d Fix minor issues not covered by PR #9137 (#9147)
• fef07fb internal: Split v3procservicepb import into pb and grpc for extproc (#9163)
• 91dd64f transport: surface subsequent data when receiving non-gRPC header (#8929)
• adc97de test/kokoro: add config for regional-td test (#9158)
• 57c9ff1 xds: ensure full-string matching for RBAC Filter rules (#9148)
• b58f32d server: Set a pprof label on new stream goroutines (#9082)
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[greptile-apps]

Greptile Summary

This PR bumps google.golang.org/grpc from v1.79.3 to v1.82.1 via Dependabot, pulling in several transitive dependency updates alongside it.

• Security fixes included: v1.82.1 adds HTTP/2 flood protection (stops reading when overwhelmed by control frames) and fixes xds/rbac DENY rules that previously ignored Metadata/RequestedServerName matchers (fail-open behavior); v1.81.1 fixes an RBAC authorization bypass in SAN-to-DN principal matching.
• Behavior change to note: The load balancing policy registry is now case-sensitive in v1.82.0; if any call-site registers or looks up a balancer policy with mixed case, it will silently fail to find it. Standard gRPC policy names are lowercase so this is unlikely to bite here.
• Additional transitive bumps: golang.org/x/crypto, golang.org/x/net, golang.org/x/text, gonum.org/v1/gonum, envoyproxy/go-control-plane/envoy, and several GCP/OTel packages are all incremented to their latest minor versions.

Confidence Score: 5/5

Straightforward dependency bump with no application logic changes; go.mod and go.sum are consistent and correct.

The only files changed are go.mod and go.sum. The version numbers and checksums are internally consistent. All the included changes carry security fixes (HTTP/2 flood DoS protection, RBAC authorization bypass fix, and xds/rbac fail-open fix), making this an important maintenance update. The one behavioral shift — the balancer registry becoming case-sensitive — is inconsequential for codebases that use standard lowercase gRPC policy names.

Files Needing Attention: No files require special attention.

Important Files Changed

Filename	Overview
go.mod	gRPC bumped from v1.79.3 to v1.82.1 with associated transitive dep updates; changes are consistent and expected for this upgrade.
go.sum	Checksums updated to match all new module versions introduced in go.mod; no anomalies.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A["google.golang.org/grpc\nv1.79.3 → v1.82.1"] --> B["Security: HTTP/2 flood protection\n(v1.82.1)"]
    A --> C["Security: xds/rbac DENY rule fix\n(v1.82.1)"]
    A --> D["Security: RBAC authz bypass fix\n(v1.81.1)"]
    A --> E["Behavior: case-sensitive\nbalancer registry (v1.82.0)"]
    A --> F["Transitive deps updated"]
    F --> G["golang.org/x/crypto v0.49→0.50\ngolang.org/x/net v0.52→0.53\ngolang.org/x/text v0.35→0.36"]
    F --> H["envoyproxy/go-control-plane/envoy\nv1.36→v1.37\ngonum.org/v1/gonum v0.16→v0.17"]
    F --> I["GCP/OTel detector packages\n(minor bumps)"]

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