CVE-2026-76237Network attack vector

Cross-tenant quarantine access via missing tenant scoping

Published Aug 19, 2026 · Updated Aug 20, 2026

Broken object level authorization in Eidetic Labs Stigmem before 0.9.0a12 allows remote authenticated users to access tenants' quarantined facts. In multi-tenant deployments using stigmem-plugin-multi-tenant, the list/count queries and _get_quarantined_fact in routes/quarantine.py omit an f.tenant_id = identity.tenant_id predicate, and quarantine garden resolution is not tenant-scoped. A tenant administrator with only a plain tenant write capability can list, read, and admit or reject another tenant's quarantined facts through /v1/quarantine; default single-tenant deployments are not affected.

CVSS severity8.6
High
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Broken object level authorization in Eidetic Labs Stigmem before 0.9.0a12 allows remote authenticated users to access tenants' quarantined facts. In multi-tenant deployments using stigmem-plugin-multi-tenant, the list/count queries and _get_quarantined_fact in routes/quarantine.py omit an f.tenant_id = identity.tenant_id predicate, and quarantine garden resolution is not tenant-scoped. A tenant administrator with only a plain tenant write capability can list, read, and admit or reject another tenant's quarantined facts through /v1/quarantine; default single-tenant deployments are not affected.

The record

CVE
CVE-2026-76237
Published
Aug 19, 2026
Updated
Aug 20, 2026
Vendor
Eidetic Labs
Product
Stigmem
Classifications
CWE-639
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <0.9.0a12

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Eidetic Labs · Stigmemversion=0 <0.9.0a12

Published CVSS scores

8.6GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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