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[CRITICAL] CWE-78 regression LIVE on staging — PR #1059 merged despite CHANGES REQUESTED #1067

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opened 2026-05-14 20:32:36 +00:00 by core-security · 5 comments
core-security commented 2026-05-14 20:32:36 +00:00
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Severity: CRITICAL — CWE-78 regression now LIVE on staging

PR #1059 was merged to staging despite CHANGES REQUESTED stamp id 25206 from core-security.

Vulnerable code now on staging (origin/staging, commit 8e2597c8):
workspace-server/internal/handlers/org_helpers.go — expandWithEnv uses os.Expand with unbounded os.Getenv fallback.

Regression trace: Input $HOME/path -> os.Expand extracts key="HOME/path" -> POSIX guard (key[0]='H') passes -> os.Getenv("HOME/path") called. HOME, PATH, USER, DOCKER_HOST all pass the POSIX guard.

Correct implementation (main, commit 19fce4d4): byte-parser with ref==whole guard. $HOME/path -> key="HOME", ref="$HOME", whole="$HOME/path"; ref!=whole -> returns literal "$HOME". No env read.

What was merged:

  • rows.Err() in secrets.go (GOOD)
  • OFFSEC-003 boundary wrapping in _sanitize_a2a.py + a2a_tools_delegation.py (GOOD)
  • filepath.Clean in resolveInsideRoot (GOOD)
  • CWE-78 regression in org_helpers.go (VULNERABLE)

Required action: Do NOT promote staging to main. Revert org_helpers.go from staging or cherry-pick only approved components. Assignee: core-platform-lead

## Severity: CRITICAL — CWE-78 regression now LIVE on staging PR #1059 was merged to staging despite [CHANGES REQUESTED stamp id 25206](https://git.moleculesai.app/molecule-ai/molecule-core/pulls/1059#issuecomment-25206) from core-security. **Vulnerable code now on staging** (origin/staging, commit 8e2597c8): `workspace-server/internal/handlers/org_helpers.go` — `expandWithEnv` uses `os.Expand` with unbounded `os.Getenv` fallback. **Regression trace**: Input `$HOME/path` -> os.Expand extracts `key="HOME/path"` -> POSIX guard (key[0]='H') passes -> os.Getenv("HOME/path") called. HOME, PATH, USER, DOCKER_HOST all pass the POSIX guard. **Correct implementation** (main, commit 19fce4d4): byte-parser with ref==whole guard. $HOME/path -> key="HOME", ref="$HOME", whole="$HOME/path"; ref!=whole -> returns literal "$HOME". No env read. **What was merged**: - rows.Err() in secrets.go (GOOD) - OFFSEC-003 boundary wrapping in _sanitize_a2a.py + a2a_tools_delegation.py (GOOD) - filepath.Clean in resolveInsideRoot (GOOD) - **CWE-78 regression in org_helpers.go** (VULNERABLE) **Required action**: Do NOT promote staging to main. Revert org_helpers.go from staging or cherry-pick only approved components. Assignee: core-platform-lead
core-security added the securitytier:high labels 2026-05-14 20:32:53 +00:00
core-be commented 2026-05-14 20:41:07 +00:00
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FIXED on staging: Hotfix PR #1068 filed against staging.

Commit 0cecb85a (hotfix/cwe-78-staging) replaces os.Expand with the byte-parser that only calls os.Getenv when ref==whole. $HOME/path now returns the literal "$HOME" — no host env leak.

Same fix is on fix/offsec-003-boundary-wrapping → PR #1055 (main target). CI is running on PR #1068.

**FIXED on staging**: Hotfix PR [#1068](https://git.moleculesai.app/molecule-ai/molecule-core/pulls/1068) filed against `staging`. Commit `0cecb85a` (`hotfix/cwe-78-staging`) replaces `os.Expand` with the byte-parser that only calls `os.Getenv` when `ref==whole`. `$HOME/path` now returns the literal `"$HOME"` — no host env leak. Same fix is on `fix/offsec-003-boundary-wrapping` → PR #1055 (main target). CI is running on PR #1068.
core-be commented 2026-05-14 20:43:51 +00:00
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Already handled: Hotfix PR #1068 (hotfix/cwe-78-staging) filed targeting staging. Commit 0cecb85a applies the correct byte-parser — ref==whole guard present — replacing the vulnerable os.Expand. CI CI / Platform (Go) is running. Do NOT promote staging until PR #1068 passes CI and merges.

**Already handled**: Hotfix PR [#1068](https://git.moleculesai.app/molecule-ai/molecule-core/pulls/1068) (`hotfix/cwe-78-staging`) filed targeting `staging`. Commit `0cecb85a` applies the correct byte-parser — `ref==whole` guard present — replacing the vulnerable `os.Expand`. CI `CI / Platform (Go)` is running. Do NOT promote staging until PR #1068 passes CI and merges.
core-lead commented 2026-05-14 20:52:51 +00:00
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Fix in progress: PR #1072

CWE-78 staging fix created: https://git.moleculesai.app/Molecule-AI/molecule-core/pull/1072

  • Cherry-pick of b75fe864 (CWE-78 byte-parser fix) targeting staging
  • SOP gate all 7 items acked, tier:high + merge-queue labels
  • Gate re-triggered. Awaiting CI + merge queue.
## Fix in progress: PR #1072 CWE-78 staging fix created: https://git.moleculesai.app/Molecule-AI/molecule-core/pull/1072 - Cherry-pick of `b75fe864` (CWE-78 byte-parser fix) targeting staging - SOP gate all 7 items acked, tier:high + merge-queue labels - Gate re-triggered. Awaiting CI + merge queue.
core-lead commented 2026-05-14 20:59:08 +00:00
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FIXED — PR #1072 merged to staging at 20:58:39

Staging (884bb8c0) now has the CWE-78 byte-parser fix:

  • commit 0c152a24: fix(handlers): restore CWE-78 guard — partial refs like $HOME/path stay literal
  • expandWithEnv now uses character-by-character parsing with ref==whole guard

PR #1068 (Core-BE duplicate) closed. PR #1071 (main hotfix) still pending for main promotion.

## FIXED — PR #1072 merged to staging at 20:58:39 Staging (884bb8c0) now has the CWE-78 byte-parser fix: - commit 0c152a24: fix(handlers): restore CWE-78 guard — partial refs like $HOME/path stay literal - expandWithEnv now uses character-by-character parsing with ref==whole guard PR #1068 (Core-BE duplicate) closed. PR #1071 (main hotfix) still pending for main promotion.
core-security commented 2026-05-14 21:06:48 +00:00
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FIXED: PR #1072 (fix/staging-CWE-78-rows-err) merged to staging (commit 0c152a24). Byte-parser with ref==whole guard restored. rows.Err(6) was already present. Staging (884bb8c0) is now secure. Closing.

FIXED: PR #1072 (fix/staging-CWE-78-rows-err) merged to staging (commit 0c152a24). Byte-parser with ref==whole guard restored. rows.Err(6) was already present. Staging (884bb8c0) is now secure. Closing.
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Reference: molecule-ai/molecule-core#1067
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