fix(minimax): pin bridge traffic to loopback - #1845
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📝 WalkthroughWalkthroughThe MiniMax text bridge now creates an explicit upstream request and forces Bun to use the loopback upstream origin. New integration coverage verifies that inherited HTTP, HTTPS, and SOCKS proxy settings do not intercept the request. ChangesMiniMax proxy isolation
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: 🟡 Moderate · up to The bridge is pinned to the local loopback listener, but the regression test does not cover lowercase proxy variables, leaving a bounded gap that could miss a future privacy regression. Add that coverage or explicitly accept the risk before merging. Possibly related PRs
Suggested reviewers: 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
✨ Finishing Touches🧪 Generate unit tests (beta)
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@coderabbitai review Please review exact head |
🧩 Analysis chain🏁 Script executed: #!/bin/bash
set -euo pipefail
echo '== HEAD =='
git rev-parse HEAD
echo '== Requested commit available =='
git cat-file -t 95206a567b7a790a875f2ce6685d30cf80c2b731
echo '== Diff summary =='
git diff --stat 366a56324992813687c52397f80f2606f9eafc29 95206a567b7a790a875f2ce6685d30cf80c2b731
echo '== Changed files =='
git diff --name-only 366a56324992813687c52397f80f2606f9eafc29 95206a567b7a790a875f2ce6685d30cf80c2b731
echo '== Complete diff =='
git diff --find-renames --find-copies --no-ext-diff --unified=80 \
366a56324992813687c52397f80f2606f9eafc29 95206a567b7a790a875f2ce6685d30cf80c2b731Length of output: 19449 🏁 Script executed: #!/bin/bash
set -euo pipefail
echo '== minimax module outline =='
ast-grep outline src/cli/minimax.ts --items all --match 'startMmxTextBridge|clearableDeadline|MmxTextBridge|MmxTextBridgeOptions|probeHostname' --view expanded || true
echo '== minimax module bridge-related context =='
rg -n -C 12 -e '\b(startMmxTextBridge|clearableDeadline|interface MmxTextBridge|type MmxTextBridge|interface MmxTextBridgeOptions|type MmxTextBridgeOptions|probeHostname)\b' src/cli/minimax.ts
echo '== test outline =='
ast-grep outline tests/minimax-clients.test.ts --items all --match 'MiniMax CLI wrapper|keeps the bridge' --view expanded || true
echo '== fixture outline =='
ast-grep outline tests/fixtures/minimax-bridge-direct.ts --items all --view expanded || true
echo '== proxy option usage =='
rg -n -C 5 -P '\bfetch\s*\(|\bproxy\s*:' --glob '*.ts' --glob '*.tsx' .
echo '== Bun and TypeScript runtime declarations =='
fd -HI -t f '^(package\.json|bunfig\.toml|tsconfig.*\.json|.*\.d\.ts)$' . \
| while IFS= read -r file; do
echo "--- $file"
rg -n -C 2 -i 'bun|proxy' "$file" || true
done
echo '== relevant package scripts and pinned versions =='
if [ -f package.json ]; then
rg -n -C 3 -i '"(packageManager|engines|bun|test|typecheck)"' package.json
fiLength of output: 186198 🏁 Script executed: #!/bin/bash
set -euo pipefail
echo '== Bun fetch proxy declaration =='
fd -HI -t f -p 'node_modules/@types/bun/index.d.ts' . \
-x rg -n -C 8 -F 'proxy?:' {} \; || true
fd -HI -t f -p 'node_modules/bun-types' . \
-x rg -n -C 8 -F 'proxy?:' {} \; || true
echo '== minimax.ts: imports, types, helpers, and bridge =='
nl -ba src/cli/minimax.ts | sed -n '1,280p'
echo '== fixture: complete =='
nl -ba tests/fixtures/minimax-bridge-direct.ts
echo '== added test and neighboring subprocess patterns =='
nl -ba tests/minimax-clients.test.ts | sed -n '1,190p'
rg -n -C 10 -P 'createServer\(\)|TEST_PROXY_PORT|Bun\.spawn\(\[process\.execPath' tests --glob '*.test.ts' --glob '*.ts'
echo '== relevant Bun lockfile entries =='
rg -n -C 3 -F '"bun"' bun.lock 2>/dev/null || trueLength of output: 1209 🏁 Script executed: #!/bin/bash
set -euo pipefail
print_numbered() {
awk '{ printf "%6d\t%s\n", NR, $0 }' "$1"
}
echo '== Bun type declaration locations =='
fd -HI -t f 'index\.d\.ts$' node_modules 2>/dev/null | rg -n '(`@types/bun`|bun-types)' || true
echo '== Bun fetch proxy declaration, if dependencies are present =='
fd -HI -t f 'index\.d\.ts$' node_modules 2>/dev/null \
| rg '(`@types/bun`|bun-types)' \
| while IFS= read -r file; do
rg -n -C 8 -F 'proxy?:' "$file" || true
done
echo '== minimax.ts: imports, bridge definitions, and bridge implementation =='
print_numbered src/cli/minimax.ts | sed -n '1,280p'
echo '== fixture: complete =='
print_numbered tests/fixtures/minimax-bridge-direct.ts
echo '== minimax client tests: imports and added regression =='
print_numbered tests/minimax-clients.test.ts | sed -n '1,180p'
echo '== analogous subprocess patterns =='
rg -n -C 8 -P 'Bun\.spawn\(\[process\.execPath|createServer\(\)|reservation\.listen' \
tests/minimax-clients.test.ts tests --glob '*.test.ts' --glob '*.ts' \
| sed -n '1,500p'
echo '== lockfile Bun entries =='
rg -n -C 3 -F '"bun"' bun.lock 2>/dev/null | sed -n '1,120p' || trueLength of output: 1565 🏁 Script executed: #!/bin/bash
set -euo pipefail
print_numbered() {
awk '{ printf "%6d\t%s\n", NR, $0 }' "$1"
}
echo '== minimax.ts: imports, types, helper, and bridge =='
print_numbered src/cli/minimax.ts | sed -n '1,280p'
echo '== fixture: complete =='
print_numbered tests/fixtures/minimax-bridge-direct.ts
echo '== minimax client tests: imports and added regression =='
print_numbered tests/minimax-clients.test.ts | sed -n '1,180p'
echo '== all direct bridge call sites =='
rg -n -C 12 -P '\bstartMmxTextBridge\s*\(' --glob '*.ts' --glob '*.tsx' . || true
echo '== analogous subprocess patterns, first 500 lines =='
(rg -n -C 8 -P 'Bun\.spawn\(\[process\.execPath|createServer\(\)|reservation\.listen' \
tests --glob '*.test.ts' --glob '*.ts' || true) | sed -n '1,500p'
echo '== current and parent implementations =='
git show 366a56324992813687c52397f80f2606f9eafc29:src/cli/minimax.ts \
| awk '{ printf "%6d\t%s\n", NR, $0 }' \
| sed -n '125,205p'Length of output: 77196 🤖 web_search executed:
Length of output: 8484
P2: Control lowercase proxy variables in the subprocess regressionIn The child can inherit Set all recognized proxy-variable spellings to the attacker URL after copying the environment. This includes lowercase names. The existing test already clears both The bridge change in ✅ Action performedReview finished.
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Inline comments:
In `@tests/minimax-clients.test.ts`:
- Around line 107-114: Update the test environment setup in the Minimax client
test to also set lowercase http_proxy, https_proxy, and all_proxy variables to
the loopback proxy URL using proxyPort, alongside the existing uppercase
variables.
🪄 Autofix
Fix all unresolved CodeRabbit comments on this PR:
- Push a commit to this branch (recommended)
- Create a new PR with the fixes
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📒 Files selected for processing (3)
src/cli/minimax.tstests/fixtures/minimax-bridge-direct.tstests/minimax-clients.test.ts
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@coderabbitai review Please review exact head |
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Tip For best results, initiate chat on the files or code changes. 🧩 Analysis chain🏁 Script executed: #!/bin/bash
set -euo pipefail
commit="e289a3254427af136b7b570ed7de39609e47cdec"
echo '== Requested commit =='
git cat-file -t "$commit"
echo '== Checked-out HEAD =='
git rev-parse HEAD
echo '== Commit metadata =='
git show -s --format='%H%nParents: %P%nSubject: %s%n%n%b' "$commit"
parent="$(git rev-parse "${commit}^")"
echo '== Diff summary =='
git diff --stat "$parent" "$commit"
echo '== Changed files =='
git diff --name-only "$parent" "$commit"
echo '== Complete diff =='
git diff --find-renames --find-copies --no-ext-diff --unified=100 "$parent" "$commit"
echo '== Affected TypeScript outlines =='
git diff --name-only "$parent" "$commit" -- '*.ts' '*.tsx' |
while IFS= read -r file; do
echo "--- $file"
ast-grep outline "$file" --items all --view expanded || true
done
echo '== Proxy environment assignments and use in relevant tests =='
rg -n -C 10 -P '(HTTP_PROXY|HTTPS_PROXY|ALL_PROXY|http_proxy|https_proxy|all_proxy|NO_PROXY|no_proxy|env\s*:)' \
tests/minimax-clients.test.ts tests/fixtures/minimax-bridge-direct.ts 2>/dev/null || true
echo '== Bridge implementation and direct call sites =='
rg -n -C 18 -P '\b(startMmxTextBridge|proxy\s*:|fetch\s*\()' \
src/cli/minimax.ts tests/fixtures/minimax-bridge-direct.ts 2>/dev/null || true
rg -n -C 8 -P '\bstartMmxTextBridge\s*\(' --glob '*.ts' --glob '*.tsx' . || trueLength of output: 35545
No new findings.
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Summary
HTTP_PROXY,HTTPS_PROXY, orALL_PROXYNO_PROXY, points uppercase and lowercase ambient proxy variables at an attacker listener, and proves the attacker receives zero requests while the local upstream receives the exact private bodyThe existing child-environment scrub protects the spawned MMX client, but the bridge itself runs in the parent process. Bun global
fetchcan honor the parent's proxy environment, so prompts and responses could leave the machine before reaching the local OpenCodex listener. The bridge already removes real admission credentials and forwards only the public loopback placeholder; this patch does not change provider authentication.No user-facing configuration or GUI behavior changes, so documentation is not required.
Verification
Published range:
366a56324992813687c52397f80f2606f9eafc29→e289a3254427af136b7b570ed7de39609e47cdec.tests/minimax-clients.test.ts— 16/16 passed (103 assertions)tests/minimax-clients.test.ts— 16/16 passed (103 assertions)git diff --checkpassede289a3254427af136b7b570ed7de39609e47cdecand the thread was resolved2196ca75-8071-4b75-8508-efe0c7d9d51a: 0 findings, complete coverage, snapshotcodex-security-snapshot/v1:sha256:9613db0f489e4d036ef33ae3816f56732b9d3e492df37e4e778ef6fcb15ff718The security scan reviewed the content-equivalent pre-rebase production patch
767491c0c560b2f7e917b63a450730ebf2d2ae32→887eb250c43e3ddc745ce1faa3e079fa568a1aa5. The no-overlap rebase preserved stable patch ID54521e71feea5e01bf3ed0b075aaed970fbdace0and identical production and original test bytes. The subsequente289a3254427af136b7b570ed7de39609e47cdeccommit changes only the regression environment matrix.The full repository suite is not claimed green; this PR remains draft for maintained cross-platform CI.
Checklist
Review readiness checklist
This PR stays in draft until every box below is ticked. Tick all four boxes once the requirements are met:
All CI tests are green on my local testing.
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Summary by CodeRabbit
Bug Fixes
Tests