Vulnerability in stigmem-node (CVE-2026-76237)
Summary
Vulnerability in stigmem-node (CVE-2026-76237). Risk of unauthorized operations or information disclosure.
Original description
The description as published by the source.
Summary
On a multi-tenant stigmem node, a tenant administrator could list, read, and admit or reject quarantined facts belonging to other tenants. The list/count queries and _get_quarantined_fact in routes/quarantine.py lacked an f.tenant_id = identity.tenant_id predicate, and the garden lookup was not tenant-scoped — reached via the /v1/quarantine list and admit/reject endpoints.
Impact
Cross-tenant confidentiality (reading another tenant's quarantined content) and cross-tenant integrity (moderating — admitting or rejecting — another tenant's facts), gated only by a plain tenant write capability rather than a node-level admin authority.
Affected configurations
This is a cross-tenant break. It is exploitable only on deployments running the opt-in stigmem-plugin-multi-tenant (multiple tenants on one node). A default single-tenant node has only tenant="default" — there is no second tenant to cross — so it is not exploitable on default deployments. The rating is HIGH for the multi-tenant deployments the plugin exists to isolate.
Patches
Fixed in 0.9.0a12 (PR #728): AND f.tenant_id = identity.tenant_id was added to the list/count queries and _get_quarantined_fact; the garden lookup is now tenant-scoped; and any genuinely cross-tenant moderation is gated behind can_admin_federation() (node superadmin), not a tenant write capability. A tenant-B admin can no longer list, admit, or reject tenant-A's quarantined facts.
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Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-76237 has been found in stigmem-node.
Risk of unauthorized operations or information disclosure.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "stigmem-node CVE-2026-76237" on the vendor's site.
CVE-2026-76237 (stigmem-node) — CWE-639
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-639) exists in stigmem-node.
Check the vendor advisory for the affected versions of stigmem-node.
Severity: ?. Risk of unauthorized operations or information disclosure.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'stigmem-node' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'stigmem-node' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
stigmem-nodeを grep し、稼働しているサービス・バージョンを把握する。 -
2Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- package github.com
- web github.com
- web disclosure@vulncheck.com
- web nvd.nist.gov
- web github.com
- web github.com