{"id":"CVE-2026-76243","aliases":["GHSA-fp6w-8wpg-74g5"],"title":"stigmem-node: Auth-disabled deployments may grant broad anonymous access outside loopback","summary":"stigmem-node: Auth-disabled deployments may grant broad anonymous access outside loopback","severity":"critical","vendor":"stigmem-node","product":"stigmem-node","ecosystem":"pip","affected":["stigmem-node < 0.9.0a2"],"patched":["stigmem-node 0.9.0a2"],"published":"2026-05-29","updated":"2026-08-20","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-fp6w-8wpg-74g5","references":[{"url":"https://github.com/eidetic-labs/stigmem/security/advisories/GHSA-fp6w-8wpg-74g5"},{"url":"https://github.com/eidetic-labs/stigmem"},{"url":"https://github.com/eidetic-labs/stigmem/blob/v0.9.0a2/CHANGELOG.md#L14-L35"},{"url":"https://github.com/eidetic-labs/stigmem/blob/v0.9.0a2/SECURITY.md"},{"url":"https://github.com/eidetic-labs/stigmem/releases/tag/v0.9.0a2"}],"tags":["osv","pip"],"epss":0.004,"epssPercentile":0.33928,"ingestedAt":"2026-08-20T19:23:05.949Z","slug":"CVE-2026-76243","body":"## Overview\n\n### Impact\nStigmem 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.\n\n### Patches\nPatched in 0.9.0a2. The node now refuses unauthenticated operation outside loopback-only local development.\n\n### Workarounds\nBefore upgrading, keep authentication enabled for all non-local deployments and do not expose nodes with authentication disabled to untrusted networks.\n\n### Upgrade\nUpgrade to the patched release:\n\n```bash\npip install --upgrade --pre stigmem-node\n```\n\nIf developers install through the Stigmem meta-package instead, they should use the matching extra for their deployments, for example:\n\n```bash\npip install --upgrade --pre 'stigmem[node]'\n```\n\n### Resources\n- Release: https://github.com/eidetic-labs/stigmem/releases/tag/v0.9.0a2\n- Changelog: https://github.com/eidetic-labs/stigmem/blob/v0.9.0a2/CHANGELOG.md#L14-L35\n- Security policy and posture: https://github.com/eidetic-labs/stigmem/blob/v0.9.0a2/SECURITY.md\n\n## Affected packages\n\n- `stigmem-node < 0.9.0a2`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `stigmem-node 0.9.0a2`","depth":"midnight","depthScore":52,"depthScoreParts":{"impact":52.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}