CVE-2026-115627 json
AshPostgres ignores attribute multitenancy on the join resource when loading many_to_many and through relationships, returning records related through other tenants' rows
published 2026-10-25 14 d ago modified 2026-10-26 13 d ago also EEF-CVE-2026-115627 , GHSA-gr2r-f49c-9gm2 , EUVD-2026-109569
- cvss
- 6.0
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 15%
- public exploits
- 0
- none known
Summary
Incorrect Authorization vulnerability in ash-project ash_postgres allows a user to load destination records linked to a source record only through another tenant's join rows.
When a many_to_many relationship, or a through relationship, is loaded with a lateral join (for example with a per-record limit or sort), AshPostgres.DataLayer builds the query for the join resource, and for each resource along a through path, in lateral_join_query/3 and through_step_queries/4 without running that resource's read action, which is where attribute multitenancy is applied. When those resources use strategy :attribute multitenancy, rows belonging to other tenants were joined, so the load returned destination records that the caller's tenant is not related to.
This issue affects ash_postgres: from 0.38.0 before 2.15.2.
Patch / fix
- hex ash_postgres 2.15.2
- ash-project ash_postgres 2.15.2
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 13 d ago
Exploit prediction
0.25% chance of exploitation in the next 30 days, higher than 15% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.0 | CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N |
| CNA | 4.0 | 6.0 | CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| hex | ash_postgres | >=0.38.0, <2.15.2 |
2.15.2 |
Affected products
- ash-project ash_postgres
Classification
- Weakness
-
- CWE-863 Incorrect Authorization
References
-
github.com
/ash-project/ash_postgres/commit/7115bec58678f13b1ac2fb4822a0ba1aea9dbec5
related, web
-
github.com
/ash-project/ash_postgres/commit/8c25c945c39a45299193fe70b09fc2fa2aacac7b
patch
-
github.com
/ash-project/ash/security/advisories/GHSA-gr2r-f49c-9gm2
vendor-advisory, related, advisory
-
cna.erlef.org
/cves/CVE-2026-115627.html
related, web
-
osv.dev
/vulnerability/EEF-CVE-2026-115627
related
-
hex.pm
/packages/ash_postgres
package
Sources
- CVE List CVE-2026-115627
- NVD CVE-2026-115627
- OSV EEF-CVE-2026-115627
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.