Follow Discord
Sweep 22 Sep 2026 · 17:19Z Build v2.1.280 501 read Stable v2.1.267 Latest v2.1.280 Next v2.1.280 Feeds RSS JSON llms.txt Unofficial
Claude Code v2.1.260 ·

New credential-header safety warning for MCP config and inference headers

MCP and inference config now warn when headers look like they leak credentials over plain HTTP or shared tokens.

TierYou'll noticehow much it should matter to you
Useful2my rating, 1 to 5
Signal1worth watching, 1 to 5
AreaPermissionswhat it touches
KindImprovementsin v2.1.260,
You'll notice Notable No documentation found

MCP and inference config now warn when headers look like they leak credentials over plain HTTP or shared tokens.

A new shared helper, credentialHeadersWarn, flags MCP server URLs/headers and inference custom headers that look like they leak plain-HTTP credentials or shared bearer tokens, with messages like "Endpoint is plain HTTP; auth credentials travel in cleartext" and "Shared bearer token: every org member authenticates as the same identity." It's applied to both managedMcpServers config and the inferenceCustomHeaders field.

Read from
Names in the bundlecredentialHeadersWarn
How sure we are
One source agreesOne thing we can check says the same as this entry.
Anthropic's release notes agreeChanged Claude apps gateway to also refuse to start, naming the field, when a desktop policy misspells a field in a nested object of a…

See this entry in the whole of v2.1.260 →

Feedback