Vulnerability · Published Aug 30, 2026 · Assigned by EEF
CVE-2026-81316Same-named aggregates with differing filters are conflated in AshSql
Low 2.1
In plain English
A low-severity incorrect authorization in ash_sql from ash-project. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 6% of all known vulnerabilities).
Official description
Incorrect Authorization vulnerability in ash-project ash_sql allows a caller to receive an aggregate value computed over rows a more restrictive filter should have excluded, disclosing counts, sums, or lists across an authorization or tenancy boundary. AshSql.Aggregate.different_queries?/2 reports two aggregate queries as different only when their filter and their sort both differ. Aggregate queries rarely carry a sort, so two aggregates that share a name but carry entirely different filters compare as identical. The colliding aggregate keeps its name and is treated as already computed, and select_aggregates returns the first-registered variant's value. The same name reaches the builder twice with different filters when actor or tenant context is stamped into each aggregate's query, so a narrowly filtered aggregate can be served the value of a previously registered broad one. This issue affects ash_sql: from 0.1.0 before 0.7.1.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| ash-project | ash_sql | 0.1.0 – before 0.7.1 |
| ash-project | ash_sql | dd092ed273dec7bd2194352f24a39229fc8ae68b – before 4b95468e5434a3526571414219719c9518be6694 |
Weakness: CWE-863 · Vector: CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
References
- https://github.com/ash-project/ash_sql/security/advisories/GHSA-v7pf-wjxc-7j5m vendor-advisory, related
- https://cna.erlef.org/cves/CVE-2026-81316.html related
- https://osv.dev/vulnerability/EEF-CVE-2026-81316 related
- https://github.com/ash-project/ash_sql/commit/4b95468e5434a3526571414219719c9518be6694 patch