CVE-2026-76236

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.

• CWE-639

• https://github.com/eidetic-labs/stigmem/security/advisories/GHSA-x26h-xmv8-gxf7
• https://www.vulncheck.com/advisories/stigmem-before-0a12-cross-tenant-bola-via-tombstones

Published

Aug 19, 2026

Last Modified

Sep 11, 2026

Status

Deferred

• Uncovering a hidden BOLA in Appsmith's snapshot logicStrix autonomously discovered a BOLA/IDOR vulnerability in Appsmith's snapshot deletion path.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-76230Renovate versions from 35.63.0 before 40.33.0 contain a comm…6.7
• CVE-2026-76231Renovate versions from 32.135.0 before 40.33.0 contain a com…6.7
• CVE-2026-76232Renovate versions from 31.51.0 before 40.33.0 contain a comm…6.7
• CVE-2026-76233Renovate versions from 39.53.0 before 40.33.0 contain a comm…6.7
• CVE-2026-76234libcrux-ecdh and libcrux-ed25519 before 0.0.6, and libcrux-p…7.5
• CVE-2026-76235A memory leak flaw was found in cockpit-ws. The login page h…7.5
• CVE-2026-76237stigmem-node before 0.9.0a12 contains a broken object level …8.6
• CVE-2026-76238stigmem versions before 0.9.0a12 contain a broken object lev…7.2
• CVE-2026-76239Stigmem before 0.9.0a11 fails to validate the delivery_addre…6.3
• CVE-2026-7624The SEO Plugin by Squirrly SEO plugin for WordPress is vulne…4.3
• CVE-2026-76240stigmem-node 0.9.0a1 interpolates Postgres backend schema id…7.5
• CVE-2026-76241stigmem-node 0.9.0a1 allows plugin signature enforcement to …7.3