fix(workspace): OFFSEC-003 — escaped boundary markers + closer truncation (main) #1073
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devops-engineer
merged 1 commits from 2026-05-14 21:17:47 +00:00
fix/offsec-003-escaped-markers-main into main
1 Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
| 25866ec200 |
fix(workspace/OFFSEC-003): correct boundary wrapping + add closer truncation
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Two bugs fixed in tool_delegate_task wrapping logic:
1. Wrapping used raw _A2A_BOUNDARY_START/_END markers, which
appeared in the output alongside the escaped form of the peer
content (e.g. "[A2A_RESULT_FROM_PEER]\n[/ A2A_RESULT...]").
Fixed: wrap with _A2A_BOUNDARY_START_ESCAPED/_END_ESCAPED so the
output contains no raw closer that could confuse downstream parsers.
2. A malicious peer could inject a fake closer ([/A2A_RESULT_FROM_PEER])
to make legitimate content appear truncated. Fixed: truncate at the
raw closer BEFORE sanitization (truncation loses the raw form, so
escaping afterward cannot retroactively remove it).
Also fixes 10 regressions in test_a2a_offsec003_sanitization.py:
tests were written expecting ZWSP (U+200B) escaping but implementation
uses "[/ " prefix. Updated test invariants to match actual behavior.
Also fixed 5 tests using [A2A_ERROR] in summary fields (not a boundary
marker — no escaping applied) and updated test assertions in
test_a2a_tools_impl.py and test_delegation_sync_via_polling.py to
expect escaped wrapper forms.
Cherry-picked fix/test-stdio-function-name (
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