GHSA-XHV3-Q4XX-349R
Vulnerability from github – Published: 2026-06-19 21:43 – Updated: 2026-06-19 21:43Summary
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.
Workarounds
None other than upgrading to 0.9.0a12. Single-tenant deployments are unaffected.
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "stigmem-node"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.9.0a12"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [],
"database_specific": {
"cwe_ids": [
"CWE-639",
"CWE-863"
],
"github_reviewed": true,
"github_reviewed_at": "2026-06-19T21:43:00Z",
"nvd_published_at": null,
"severity": "HIGH"
},
"details": "### Summary\nOn 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 \u2014 reached via the `/v1/quarantine` list and admit/reject endpoints.\n\n### Impact\nCross-tenant confidentiality (reading another tenant\u0027s quarantined content) and cross-tenant integrity (moderating \u2014 admitting or rejecting \u2014 another tenant\u0027s facts), gated only by a plain tenant `write` capability rather than a node-level admin authority.\n\n### Affected configurations\nThis 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\"` \u2014 there is no second tenant to cross \u2014 so it is **not exploitable** on default deployments. The rating is HIGH for the multi-tenant deployments the plugin exists to isolate.\n\n### Patches\nFixed 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\u0027s quarantined facts.\n\n### Workarounds\nNone other than upgrading to `0.9.0a12`. Single-tenant deployments are unaffected.",
"id": "GHSA-xhv3-q4xx-349r",
"modified": "2026-06-19T21:43:00Z",
"published": "2026-06-19T21:43:00Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/eidetic-labs/stigmem/security/advisories/GHSA-xhv3-q4xx-349r"
},
{
"type": "WEB",
"url": "https://github.com/eidetic-labs/stigmem/pull/728"
},
{
"type": "PACKAGE",
"url": "https://github.com/eidetic-labs/stigmem"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "stistigmem-node: quarantine review surface exposes and mutates other tenants\u0027 quarantined facts (cross-tenant BOLA)"
}
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
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- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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