# NousResearch/hermes-agent · SSRF guard bypass via IPv4-translated IPv6 addresses

## Open now

- Nothing open on GitHub.

A bug report and related fix attempts address a gap in SSRF protection where IPv4-translated IPv6 addresses (::ffff:0:x.x.x.x) are not evaluated by their embedded IPv4 component, allowing bypass of configured restrictions. The members cover the vulnerability report and at least two fix iterations targeting the same classification logic.

## TL;DR

- 3 member(s): 0 open issue(s), 1 closed issue(s), 0 open PR(s), 1 merged PR(s), 1 PR(s) closed without merging.
- A fix was merged to main in PR #117565. Verify it addresses your case.
- **Recommended:** read PR #117565 (and any competing PRs below) before filing. Confirm the merged change covers your symptom.

## Maintainer resolution verdict

- Internal-tracker verdict over this cluster's issue members: `resolved` · deciding PR(s): `pr-117565`. This is distinct from the fix status above. Weigh it yourself.

## How this cluster was grouped

- Link evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.
- Pairwise link density `0.67`: the share of member pairs that carry a link, counting a structural link in full and a relevance-only link at 0.36. `1.00` means every pair is linked.

## Closed / duplicate issues

- #117100: \[Bug\]: SSRF guard misses the IPv4-translated DNS answer (::ffff:0:x.x.x.x) — declared fake_ip_ranges cannot excuse it, metadata floor bypassed

## Prior & competing PRs

- **#117565: fix(url_safety): IPv4-translated DNS answers (::ffff:0:x.x.x.x) are judged by their embedded IPv4 (#117100, salvage #117101)**. merged to main · fix tier `verified`
  - maintainer direction: category `merged`
  - files: `tests/tools/test_url_safety.py`, `tools/url_safety.py`
- **#117101: fix(url_safety): classify the IPv4-translated wrapper (::ffff:0:x.x.x.x) by its embedded IPv4**. closed without merge
  - maintainer direction: category `merged_via`; implication `superseded`; refs `2163a426c8`, `#117565`

## Fix status

- Merged to main in PR #117565 (cited above). No release data is tracked. Verify downstream.
- Fix last verified (merged) `2026-09-20`.