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MCP route returns 502 permanently after an outbound-connection reload (ext_proc: error getting upstream token)

Status: Open.

#6730 In pomerium/pomerium;

· ptota-coder opened on Sep 4, 2026

MCP upstream OAuth: upstream URL is built from the downstream :scheme, breaking PRM validation behind a TLS-terminating proxy

Status: Open.

#6698 In pomerium/pomerium;

· 123andy opened on Aug 27, 2026

MCP CIMD clients using private_key_jwt fail at /authorize with "unsupported token endpoint auth method"

mcp

Status: Open.

#6692 In pomerium/pomerium;

· nickytonline opened on Aug 25, 2026

Support alternative header for Cloud Run serverless auth

Status: Open.

#6677 In pomerium/pomerium;

· langered opened on Aug 18, 2026

mcp: no way to disable CIMD advertisement, so DCR-preferring configuration is unreachable

Status: Open.

#6675 In pomerium/pomerium;

· extrawurst opened on Aug 18, 2026

Opt-in OAuth 2.1 resource-server behavior for plain API routes (decoupled from mcp.server)

Status: Open.

#6600 In pomerium/pomerium;

· wyvernzora opened on Jul 24, 2026

MCP getOrRecreateSession replays a stale upstream refresh token when the IdP rotates refresh tokens

Status: Open.

#6530 In pomerium/pomerium;

· ShakeyJ82 opened on Jul 15, 2026

idp_access_token bearer auth fails under use_proxy_protocol: true (all-in-one): internal verify-access-token loopback is reset

Status: Open.

#6503 In pomerium/pomerium;

· ElXreno opened on Jul 9, 2026

MCP authorization code can fail with invalid_grant when it contains a + (StdEncoding vs form-urlencoded body)

Status: Open.

#6430 In pomerium/pomerium;

· makvitaly opened on Jun 8, 2026

Chore: migrate to @eslint-react/eslint-plugin

Status: Open.

#6414 In pomerium/pomerium;

· nickytonline opened on Jun 3, 2026

FR: Custom Error handler

Status: Open.

#6343 In pomerium/pomerium;

· dombyte opened on May 13, 2026

Better handling for allow_websockets and HTTP/2 health check

Status: Open.

#6278 In pomerium/pomerium;

· kenjenkins opened on Apr 17, 2026