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fix: don't leak internal error detail in GET /v0/servers 500 response - #1338
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ListServersError passed the raw err into huma.Error500InternalServerError, which huma serializes into the response body's `errors` array. On the public, unauthenticated GET /v0/servers endpoint this echoed internal pgx/DB error detail (e.g. from postgres.go "error iterating rows") back to clients (CWE-209). Log it server-side only, matching the sibling handlers in servers.go. Adds a regression test asserting the 500 response body does not contain the internal error string. Closes #1337 Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
rdimitrov
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Jul 10, 2026
Addresses review findings on the org-namespace-admin-only change: - Don't leak internal error detail in the github-at 401. The handler passed the wrapped err (which can include the raw upstream GitHub response body from readErrorBody) into huma.Error401Unauthorized, and huma serializes extra err args into the response body (CWE-209) — the same leak fixed for GET /v0/servers in #1338. Log it server-side and return only a generic message. Regression test added (github_at_internal_test.go), mirroring #1338. - Fail closed on a SAML/SSO-enforcement 403 (X-GitHub-SSO header) instead of treating it as a missing-scope 403 and silently degrading a legitimate Owner to personal-only with no signal. - Re-check membership state=active client-side, not only via the query param, so a dropped/changed param can't grant a pending (not-yet-accepted) owner invitation. - Cap the org-memberships pagination loop (previously unbounded) and fail closed if the cap is hit with full pages, rather than returning a possibly-truncated grant. - In buildPermissions, skip an org whose name fails validation instead of returning nil for the whole set, so one unexpected org name can't strip the caller's personal namespace or their other valid org grants. - Correct the role comment: GET /user/memberships/orgs returns "admin"/"member", not "billing_manager". Adds tests for pending-state exclusion, billing_manager exclusion, and Retry-After / SSO 403 fail-closed handling. Co-Authored-By: Claude Opus 4.8 <[email protected]>
social4hyq
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Sep 20, 2026
mcp-publisher 1.8.0 Created-by: HarmonybrewBot Commit-by: HarmonybrewBot Merged-by: HarmonybrewBot Description: Created by `brew bump` --- Created with `brew bump-formula-pr`.<details> <summary>release notes</summary> <pre>## What's Changed * deploy: update prod to v1.7.9 by @rdimitrov in modelcontextprotocol/registry#1282 * build(deps): bump github.com/pulumi/pulumi/sdk/v3 from 3.237.0 to 3.238.0 in /deploy by @dependabot[bot] in modelcontextprotocol/registry#1283 * chore(deps): reduce dependabot frequency from daily to weekly by @rdimitrov in modelcontextprotocol/registry#1284 * build(deps): bump github.com/go-git/go-git/v5 from 5.19.0 to 5.19.1 in /deploy by @dependabot[bot] in modelcontextprotocol/registry#1292 * build(deps): bump github.com/google/go-containerregistry from 0.21.5 to 0.21.6 by @dependabot[bot] in modelcontextprotocol/registry#1295 * build(deps): bump github.com/danielgtaylor/huma/v2 from 2.37.3 to 2.38.0 by @dependabot[bot] in modelcontextprotocol/registry#1296 * build(deps): bump github.com/pulumi/pulumi/sdk/v3 from 3.238.0 to 3.242.0 in /deploy by @dependabot[bot] in modelcontextprotocol/registry#1297 * build(deps): bump goreleaser/goreleaser-action from 7.2.1 to 7.2.2 in the actions group by @dependabot[bot] in modelcontextprotocol/registry#1299 * build(deps): bump golang.org/x/net to v0.55.0 by @rdimitrov in modelcontextprotocol/registry#1308 * build(deps): bump github.com/pulumi/pulumi-kubernetes/sdk/v4 from 4.30.0 to 4.31.1 in /deploy by @dependabot[bot] in modelcontextprotocol/registry#1298 * docs: update maintainer/collaborator matrix in README by @tadasant in modelcontextprotocol/registry#1324 * build(deps): bump the actions group with 2 updates by @dependabot[bot] in modelcontextprotocol/registry#1314 * build(deps): bump github.com/pulumi/pulumi/sdk/v3 from 3.242.0 to 3.243.0 in /deploy by @dependabot[bot] in modelcontextprotocol/registry#1313 * build(deps): bump github.com/Azure/azure-sdk-for-go/sdk/security/keyvault/azkeys from 1.4.0 to 1.5.0 by @dependabot[bot] in modelcontextprotocol/registry#1312 * build(deps): bump the opentelemetry group with 5 updates by @dependabot[bot] in modelcontextprotocol/registry#1311 * feat: add cargo (crates.io) as a package registry type by @Wolfe-Jam in modelcontextprotocol/registry#1207 * build(deps): bump go.opentelemetry.io/contrib/instrumentation/runtime from 0.68.0 to 0.69.0 in the opentelemetry group by @dependabot[bot] in modelcontextprotocol/registry#1332 * build(deps): bump github.com/pulumi/pulumi/sdk/v3 from 3.243.0 to 3.244.0 in /deploy by @dependabot[bot] in modelcontextprotocol/registry#1333 * build(deps): bump github.com/jackc/pgx/v5 from 5.9.2 to 5.10.0 by @dependabot[bot] in modelcontextprotocol/registry#1334 * fix(cargo): harden README fetch, clarify status handling, strengthen tests by @rdimitrov in modelcontextprotocol/registry#1330 * fix(validators): harden mcp-name matching (PyPI/NuGet anchoring, comment-form safe) + cargo follow-ups by @rdimitrov in modelcontextprotocol/registry#1331 * fix: client-cancelled GET /v0/servers returns 499 without error log by @advancedresearcharray in modelcontextprotocol/registry#1335 * fix: don't leak internal error detail in GET /v0/servers 500 response by @rdimitrov in modelcontextprotocol/registry#1338 * build(deps): bump the actions group with 2 updates by @dependabot[bot] in modelcontextprotocol/registry#1392 * build(deps): bump github.com/pulumi/pulumi/sdk/v3 from 3.244.0 to 3.248.0 in /deploy by @dependabot[bot] in modelcontextprotocol/registry#1391 * build(deps): bump github.com/Azure/azure-sdk-for-go/sdk/azidentity from 1.13.1 to 1.14.0 by @dependabot[bot] in modelcontextprotocol/registry#1375 * build(deps): bump github.com/coreos/go-oidc/v3 from 3.18.0 to 3.19.0 by @dependabot[bot] in modelcontextprotocol/registry#1374 * build(deps): bump github.com/google/go-containerregistry from 0.21.6 to 0.21.7 by @dependabot[bot] in modelcontextprotocol/registry#1373 * Fix broken reference documentation links by @kriptoburak in modelcontextprotocol/registry#1387 * build(deps): bump github.com/pulumi/pulumi-kubernetes/sdk/v4 from 4.31.1 to 4.32.0 in /deploy by @dependabot[bot] in modelcontextprotocol/registry#1353 * ci: auto-close PRs that try to publish servers via the repo by @rdimitrov in modelcontextprotocol/registry#1393 * build(deps): bump golang.org/x/mod from 0.37.0 to 0.38.0 by @dependabot[bot] in modelcontextprotocol/registry#1428 * build(deps): bump github.com/coreos/go-oidc/v3 from 3.19.0 to 3.20.0 by @dependabot[bot] in modelcontextprotocol/registry#1429 * build(deps): bump the actions group across 1 directory with 4 updates by @dependabot[bot] in modelcontextprotocol/registry#1430 * build(deps): bump github.com/pulumi/pulumi/sdk/v3 from 3.248.0 to 3.251.0 in /deploy by @dependabot[bot] in modelcontextprotocol/registry#1431 * fix(auth): grant org namespace only to org Owners, not all members by @tadasant in modelcontextprotocol/registry#1383 * build(deps): bump golang.org/x/crypto from 0.51.0 to 0.52.0 by @dependabot[bot] in modelcontextprotocol/registry#1433 * docs(auth): document fine-grained PAT permission for org publishing (+ pagination-cap test) by @rdimitrov in modelcontextprotocol/registry#1435 * docs: add polygraph to community projects by @RubenSousaDinis in modelcontextprotocol/registry#1421 * fix(ci): re-validate author association via REST in close-invalid-publish-prs by @rdimitrov in modelcontextprotocol/registry#1440 * fix: reject mangled publisher metadata by @he-yufeng in modelcontextprotocol/registry#1310 * fix(api): allow PATCH in CORS so browsers can call the status endpoints by @JosephDoUrden in modelcontextprotocol/registry#1436 * test(api): remove placeholder CORS test superseded by #1436 by @rdimitrov in modelcontextprotocol/registry#1441 * fix(validators): distinguish a missing package from a missing version on PyPI/NPM by @sronix in modelcontextprotocol/registry#1411 ## New Contributors * @Wolfe-Jam made their first contribution in modelcontextprotocol/registry#1207 * @advancedresearcharray made their first contribution in modelcontextprotocol/registry#1335 * @kriptoburak made their first contribution in modelcontextprotocol/registry#1387 * @RubenSousaDinis made their first contribution in modelcontextprotocol/registry#1421 * @he-yufeng made their first contribution in modelcontextprotocol/registry#1310 * @sronix made their first contribution in modelcontextprotocol/registry#1411 **Full Changelog**: https://github.com/modelcontextprotocol/registry/compare/v1.7.9...v1.8.0</pre> <p>View the full release notes at <a href="https://github.com/modelcontextprotocol/registry/releases/tag/v1.8.0">https://github.com/modelcontextprotocol/registry/releases/tag/v1.8.0</a>.</p> </details> <hr> See merge request: Harmonybrew/homebrew-core!14181
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Summary
Fixes the information-disclosure regression introduced by #1335 (item 1 of #1337).
ListServersErrorpassed the rawerrintohuma.Error500InternalServerError(...). huma serializes extra error args into the response body'serrorsarray (ErrorModel.Errors,json:"errors,omitempty"), so on the public, unauthenticatedGET /v0/serversendpoint a genuine DB failure echoed the internal wrapped error frominternal/database/postgres.go(error iterating rows: <pgx error>) back to the client. pgx/pgconn errors can carry SQLSTATE codes, constraint/table/column names, and internal messages (CWE-209).Change
errfrom the 500 call so only the generic message is returned; keeplog.Printffor the server-side detail — matching the sibling handlers (servers.go:190/220,edit.go,status.go).TestListServersError_realFailureDoesNotLeakDetail) that marshals the 500 error and asserts the internal detail is absent from the client-visible body. Existing tests only asserted status codes, which is why the leak slipped through.The 499 client-cancelled path is unchanged (the client has already disconnected, so nothing is leaked there).
Test plan
go test ./internal/api/handlers/v0/... -run ListServersError(3/3 pass)go build ./...,go vet,golangci-lint(no new findings in changed files)Note
This leaves the non-security items in #1337 (correcting the
superfluous WriteHeaderclaim,statusClientClosedconst reuse, broader cancellation-guard scope) for separate follow-up. Closing #1337 here since the only security-impacting item is addressed; reopen/split if you'd prefer to track the nits independently.Closes #1337
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