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TI-2026-53341 Aliases CVE-2026-76236GHSA-77m3-9g4f-372v

stigmem before 0.9.0a12 Cross-Tenant BOLA via Tombstones

Priority LOW 32CWE-639Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
Low · High · Low
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-639.

Summary

stigmem-node before 0.9.0a12 contains a cross-tenant broken object level authorization (BOLA) flaw in the RTBF (right-to-be-forgotten) tombstone mechanism. issue_tombstone defaulted the tenant to "default" instead of the caller's tenant, allowing deletion records to be written to the wrong tenant, and the read-suppression path (_get_tombstone_filter and the tombstone scope cache) lacked a tenant_id predicate, so tombstone suppression was applied tenant-blind across fact queries and provenance reads. As a result, a tenant's deletion could be attributed to the wrong tenant and tombstone suppression could either hide facts belonging to other tenants or fail to hide facts within the correct tenant, undermining data isolation and RTBF guarantees. The issue is exploitable only on multi-tenant deployments running the opt-in stigmem-plugin-multi-tenant; single-tenant deployments are unaffected. Fixed in 0.9.0a12.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00364 30th percentileScored 2026-11-07
Fix Fixed stigmem-node (eidetic-labs): 0.9.0a12

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
eidetic-labsstigmem-nodebefore 0.9.0a120.9.0a12Patch availableCNA
  • stigmem-node Vendoreidetic-labs Affected before 0.9.0a12 Fixed in 0.9.0a12 Patch available CNA

Remediation

  • Fix · CNA stigmem-node (eidetic-labs) Fixed in 0.9.0a12

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    eidetic-labs stigmem-node 0.9.0a12

    3 records Highest priority Priority LOW 3 LOW

    Other records, highest priority first

    • TI-2026-53342 stigmem before 0.9.0a12 Cross-Tenant BOLA via quarantinePriority LOW 39
    • TI-2026-53343 stigmem before 0.9.0a12 Cross-Tenant BOLA via decay sweepPriority LOW 34
    Show all 3 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-76236
  2. 2026-10-03 Alias added: GHSA-77m3-9g4f-372v

References

Advisory 1

  • TI-2026-53344 Stigmem before 0.9.0a11 SSRF via unvalidated webhook delivery_address CVSS 4.0MEDIUM 5.3
  • TI-2026-53348 stigmem before 0.9.0a2 Authentication Bypass via Disabled Auth CVSS 4.0CRITICAL 9.2
  • TI-2026-53349 stigmem-node Insecure Federation Transport Configuration CVSS 4.0CRITICAL 9.1
  • TI-2026-53347 stigmem Federation Peer Registration Authentication Bypass CVSS 4.0CRITICAL 9.1
  • TI-2026-53342 stigmem before 0.9.0a12 Cross-Tenant BOLA via quarantine CVSS 4.0HIGH 8.6
  • TI-2026-53345 stigmem Postgres SQL Injection via Schema Identifier CVSS 4.0HIGH 7.5
See all 9 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences