CVE-2026-78699

The record

Unchecked Return Value vulnerability in ash-project ash_postgres allows a user who can drive a tenant rename to a name that collides with an existing tenant's schema to have their tenant record repointed at that other tenant's live schema, gaining access to its data. AshPostgres.MultiTenancy.rename_tenant/3 issues the ALTER SCHEMA ... RENAME TO ... with the non-raising Ecto.Adapters.SQL.query/2, discards its {:ok, _} | {:error, _} result, and unconditionally returns :ok. PostgreSQL rejects the rename when the target schema already exists (and on insufficient privilege or lock timeout), but that failure never reaches the caller. The calling manage_tenant update action therefore sees success and commits the tenant row with the new name, which is the schema of a different existing tenant, so subsequent reads and writes for that tenant run against the other tenant's data. This issue affects ash_postgres: from 0.25.0 before 2.13.0.

Affected packages

Related vulnerabilities

• CVE-2026-111497 A buffer overflow vulnerability in the Brotli decoder (c/dec/decode.c) in Google Brotli… CWE-252
• CVE-2026-110353 HAProxy 3.2 before 3.4.6 allows a remote unauthenticated attacker to cause a denial of… CWE-252
• CVE-2026-106436 The BSON encoder in the MongoDB PHP Driver does not check some return values after a… CWE-252
• CVE-2026-86141 xmlregexp in libxml2 before 2.15.4 has a NULL pointer dereference in xmlRegNewParserCtxt… CWE-252
• CVE-2026-19534 undici's WebSocket client crashes the whole Node.js process during the opening handshake… CWE-252
• CVE-2026-85649 (Holloway) Chew, Kean Ho's Actualizer v1.2.0 and earlier contains a fail-open password… CWE-252
• CVE-2026-14957 In FIPS mode, Libreswan's add_decoded_cert() function calls CERT_ExtractPublicKey() and… CWE-252
• CVE-2026-79772 Nokogiri versions before 1.19.1 fail to check the return value from xmlC14NExecute in the… CWE-252