stigmem-node: Auth-disabled deployments may grant broad anonymous access outside loopback

### Impact Stigmem nodes configured with authentication disabled could grant the anonymous identity broad read/write/federation capabilities if exposed outside a loopback-only local development environment. Impacted users are operators who intentionally disabled authentication while binding the node to a non-loopback URL. ### Patches Patched in 0.9.0a2. The node now refuses unauthenticated operation outside loopback-only local development. ### Workarounds Before upgrading, keep authentication enabled for all non-local deployments and do not expose nodes with authentication disabled to untrusted networks. ### Upgrade Upgrade to the patched release: ```bash pip install --upgrade --pre stigmem-node ``` If developers install through the Stigmem meta-package instead, they should use the matching extra for their deployments, for example: ```bash pip install --upgrade --pre 'stigmem[node]' ``` ### Resources - Release: https://github.com/eidetic-labs/stigmem/releases/tag/v0.9.0a2 - Changelog: https://github.com/eidetic-labs/stigmem/blob/v0.9.0a2/CHANGELOG.md#L14-L35 - Security policy and posture: https://github.com/eidetic-labs/stigmem/blob/v0.9.0a2/SECURITY.md Source Code Location: https://github.com/eidetic-labs/stigmem Affected Packages: - pip:stigmem-node, affected < 0.9.0a2, patched in 0.9.0a2 CWEs: - CWE-285: Improper Authorization - CWE-862: Missing Authorization CVSS: - CVSS_V4: score 9.2, CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N References: - https://github.com/eidetic-labs/stigmem/security/advisories/GHSA-fp6w-8wpg-74g5 - https://github.com/eidetic-labs/stigmem/blob/v0.9.0a2/CHANGELOG.md#L14-L35 - https://github.com/eidetic-labs/stigmem/blob/v0.9.0a2/SECURITY.md - https://github.com/eidetic-labs/stigmem/releases/tag/v0.9.0a2 - https://github.com/advisories/GHSA-fp6w-8wpg-74g5