What’s Vulnerable › Vulnerabilities

CVE-2026-114214: Loading a through relationship with a limit of 1 in Ash ignores the through path and returns unrelated destination records

• Severity: medium (CVSS 6.0 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-25 · updated 2026-10-26
• Weakness: CWE-863

Description

Incorrect Authorization vulnerability in ash-project ash allows a client to read destination records unrelated to the source record through a through relationship. When a has_many relationship declared with through: was loaded for a single record with a limit of 1, or an unsorted has_one through relationship was loaded with a limit of 1, lateral_join?/4 in lib/ash/actions/read/relationships.ex chose the path that reads the destination without any filter linking it to the source. The load returned the first destination record by sort, or any other record with an offset. The read still runs the destination's policies but carries the relationship as accessing_from, so a client paging such a field (for example teachers(limit: 1, offset: n) through AshGraphql) can enumerate destination records that policies allow only when reached through that relationship. This issue affects ash: from 3.24.0 before 3.37.1.

Affected products

• ash-project ash: from 3.24.0 before 3.37.1 — fixed in 3.37.1

How to fix

Upgrade to a fixed version: ash-project ash 3.37.1. Check the vendor advisory for mitigations.

References

• https://cna.erlef.org/cves/CVE-2026-114214.html
• https://github.com/ash-project/ash/commit/24f41e23dcbd9d07cde270a8141490e8f79251f5
• https://github.com/ash-project/ash/commit/e37463307304b26bc8fd606322e5c4d8f7f060e5
• https://github.com/ash-project/ash/security/advisories/GHSA-g2h4-xp57-q863
• https://osv.dev/vulnerability/EEF-CVE-2026-114214

Get alerted when CVE-2026-114214 or the next vulnerability affects your stack