# NousResearch/hermes-agent · MCP OAuth PKCE callback attribution fixes

## Open now

- 1 issue, 2 PRs open on GitHub.
- #134964: MCP OAuth paste fallback falsely accepts a callback from a different PKCE flow
- PR #134978: fix(mcp): reject a pasted OAuth callback from a different PKCE flow
- PR #135159: fix(mcp): callbacks are attributed to the login that printed their URL

These items address bugs where OAuth callbacks in MCP flows could be incorrectly accepted or attributed to the wrong PKCE session. The work focuses on ensuring callbacks are matched to the correct login flow.

## TL;DR

- 3 member(s): 1 open issue(s), 0 closed issue(s), 2 open PR(s), 0 merged PR(s), 0 PR(s) closed without merging.
- No fix has been merged to main; one or more PRs were attempted (see below).
- **Recommended:** review the prior/competing PR(s) below. A fix was attempted but not merged; your case may extend or revive that work.

## Maintainer resolution verdict

- Internal-tracker verdict over this cluster's issue members: `unresolved`. 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evidence (`STRUCTURAL_SPANNING`): every member is connected by structural evidence: shared changed files, or a closing/superseded reference.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.

## Open related issues

- #134964: MCP OAuth paste fallback falsely accepts a callback from a different PKCE flow

## Prior & competing PRs

- **#134978: fix(mcp): reject a pasted OAuth callback from a different PKCE flow**. open
  - maintainer direction: category `silent_close`; implication `active`
  - files: `tests/tools/test_mcp_oauth.py`, `tools/mcp_oauth.py`, `tools/mcp_oauth_provider.py`
- **#135159: fix(mcp): callbacks are attributed to the login that printed their URL**. open
  - maintainer direction: category `uncategorized`; implication `needs_llm`
  - files: `tests/tools/test_mcp_paste_state_attribution.py`, `tools/mcp_oauth.py`, `tools/mcp_oauth_provider.py`

## Fix status

- No merged fix on record.
- Subsystem: `mcp`