EEF-CVE-2026-86338

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Source
https://cna.erlef.org/osv/EEF-CVE-2026-86338.html
Import Source
https://cna.erlef.org/osv/EEF-CVE-2026-86338.json
JSON Data
https://api.osv.dev/v1/vulns/EEF-CVE-2026-86338
Aliases
  • CVE-2026-86338
  • GHSA-7qr8-wrvq-566q
Published
2026-09-16T08:28:44Z
Modified
2026-09-16T08:40:58Z
Severity
  • 6.0 (Medium) CVSS_V4 - 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 CVSS Calculator
Summary
Ash field policies do not filter-nil forbidden calculations and aggregates, enabling an information-disclosure oracle
Details

Summary

Ash field_policies are documented to protect against filter-based information disclosure: when a field the actor may not see is referenced in a filter, it is replaced with an expression that evaluates to nil, so a filter cannot be used as a yes/no oracle to read a value the actor cannot see.

This nilling was applied to attributes but not to calculations or aggregates. A user-supplied filter reference to a calculation or aggregate carries an Ash.Query.Calculation / Ash.Query.Aggregate struct, which the authorizer's reference replacement did not match (it only matched the Ash.Resource.* structs), so the filter ran against the real value.

As a result, an actor whose field policies forbid a calculation or aggregate can still filter by it (for example filter(secret_calc == "x") or filter(comment_count == n)) and learn the value from whether rows match — an oracle that recovers field-policy-protected values one probe at a time. Filtering is commonly exposed to lower-privileged actors (for example via AshGraphql or AshJsonApi filter arguments), which is exactly the surface field policies are meant to protect.

The fix routes filter references to calculations and aggregates through the same field-policy nilling as attributes.

This issue affects ash: from 2.11.0-rc.0 before 3.33.4.

Configurations

Reachable only when an application uses Ash.Policy.Authorizer field policies to restrict a calculation or aggregate, and exposes filtering on it to an actor who is denied that field (for example an authenticated user filtering through AshGraphql or AshJsonApi).

Database specific 
{
    "capec_ids": [
        "CAPEC-1"
    ],
    "cpe_ids": [
        "cpe:2.3:a:ash-project:ash:*:*:*:*:*:*:*:*"
    ],
    "cwe_ids": [
        "CWE-1220"
    ]
}
References
Credits
    • Jesse Williams - REPORTER
    • Zach Daniel / Ash Project - REMEDIATION_DEVELOPER
    • Jonatan Männchen / EEF - COORDINATOR
    • Jesse Williams - FINDER

Affected packages

Hex / ash

Package

Name
ash
Purl
pkg:hex/ash

Affected ranges

Type
SEMVER
Events
Introduced
2.11.0-rc.0
Fixed
3.33.4

Affected versions

2.*
2.11.0-rc.0
2.11.0-rc.1
2.11.0-rc.2
2.11.0-rc.3
2.11.0
2.11.1
2.11.2
2.11.3
2.11.4
2.11.5
2.11.6
2.11.7
2.11.8
2.11.9
2.11.10
2.11.11
2.12.0
2.12.1
2.13.0
2.13.1
2.13.2
2.13.3
2.13.4
2.14.0
2.14.1
2.14.2
2.14.3
2.14.4
2.14.5
2.14.6
2.14.7
2.14.8
2.14.9
2.14.10
2.14.11
2.14.12
2.14.13
2.14.14
2.14.15
2.14.16
2.14.17
2.14.18
2.14.19
2.14.20
2.14.21
2.15.0
2.15.1
2.15.2
2.15.4
2.15.5
2.15.6
2.15.7
2.15.8
2.15.9
2.15.10
2.15.11
2.15.12
2.15.13
2.15.14
2.15.15
2.15.16
2.15.17
2.15.18
2.15.19
2.15.20
2.16.0
2.16.1
2.17.0
2.17.1
2.17.2
2.17.3
2.17.4
2.17.5
2.17.6
2.17.7
2.17.8
2.17.9
2.17.10
2.17.11
2.17.12
2.17.13
2.17.14
2.17.15
2.17.16
2.17.17
2.17.18
2.17.19
2.17.20
2.17.21
2.17.22
2.17.23
2.17.24
2.18.0
2.18.1
2.18.2
2.19.0
2.19.1
2.19.2
2.19.3
2.19.4
2.19.5
2.19.6
2.19.7
2.19.8
2.19.9
2.19.10
2.19.11
2.19.12
2.19.13
2.19.14
2.20.0
2.20.1
2.20.2
2.20.3
2.21.0
2.21.1
2.21.2
2.21.3
2.21.4
2.21.5
2.21.6
2.21.7
2.21.8
2.21.9
2.21.10
2.21.11
2.21.12
2.21.13
2.21.14
2.21.15
3.*
3.0.0-rc.0
3.0.0-rc.1
3.0.0-rc.3
3.0.0-rc.4
3.0.0-rc.5
3.0.0-rc.6
3.0.0-rc.7
3.0.0-rc.8
3.0.0-rc.9
3.0.0-rc.10
3.0.0-rc.11
3.0.0-rc.12
3.0.0-rc.13
3.0.0-rc.14
3.0.0-rc.15
3.0.0-rc.16
3.0.0-rc.17
3.0.0-rc.18
3.0.0-rc.19
3.0.0-rc.20
3.0.0-rc.21
3.0.0-rc.22
3.0.0-rc.23
3.0.0-rc.24
3.0.0-rc.25
3.0.0-rc.26
3.0.0-rc.27
3.0.0-rc.28
3.0.0-rc.29
3.0.0-rc.31
3.0.0-rc.32
3.0.0-rc.33
3.0.0-rc.34
3.0.0-rc.35
3.0.0-rc.36
3.0.0-rc.37
3.0.0-rc.38
3.0.0-rc.39
3.0.0-rc.40
3.0.0-rc.41
3.0.0-rc.42
3.0.0-rc.43
3.0.0-rc.44
3.0.0-rc.45
3.0.0-rc.46
3.0.0
3.0.1
3.0.2
3.0.3
3.0.4
3.0.5
3.0.6
3.0.7
3.0.8
3.0.9
3.0.10
3.0.11
3.0.12
3.0.13
3.0.14
3.0.15
3.0.16
3.1.0
3.1.1
3.1.2
3.1.3
3.1.4
3.1.5
3.1.6
3.1.7
3.1.8
3.2.0
3.2.1
3.2.2
3.2.3
3.2.4
3.2.5
3.2.6
3.3.0
3.3.1
3.3.2
3.3.3
3.4.0
3.4.1
3.4.2
3.4.3
3.4.4
3.4.5
3.4.6
3.4.7
3.4.8
3.4.9
3.4.10
3.4.11
3.4.12
3.4.13
3.4.14
3.4.15
3.4.16
3.4.17
3.4.18
3.4.19
3.4.20
3.4.21
3.4.22
3.4.23
3.4.24
3.4.25
3.4.26
3.4.27
3.4.28
3.4.29
3.4.30
3.4.31
3.4.32
3.4.33
3.4.34
3.4.35
3.4.36
3.4.37
3.4.38
3.4.39
3.4.40
3.4.41
3.4.42
3.4.43
3.4.44
3.4.45
3.4.46
3.4.47
3.4.48
3.4.49
3.4.50
3.4.51
3.4.52
3.4.53
3.4.54
3.4.55
3.4.56
3.4.57
3.4.58
3.4.59
3.4.60
3.4.61
3.4.62
3.4.63
3.4.64
3.4.65
3.4.66
3.4.67
3.4.68
3.4.69
3.4.70
3.4.71
3.4.72
3.4.73
3.4.74
3.5.0
3.5.1
3.5.2
3.5.3
3.5.4
3.5.5
3.5.6
3.5.7
3.5.8
3.5.9
3.5.10
3.5.11
3.5.12
3.5.13
3.5.14
3.5.15
3.5.16
3.5.17
3.5.18
3.5.19
3.5.20
3.5.21
3.5.22
3.5.23
3.5.24
3.5.25
3.5.26
3.5.27
3.5.28
3.5.29
3.5.30
3.5.31
3.5.32
3.5.33
3.5.34
3.5.35
3.5.36
3.5.37
3.5.38
3.5.39
3.5.40
3.5.41
3.5.42
3.5.43
3.6.0
3.6.1
3.6.2
3.6.3
3.7.0
3.7.1
3.7.2
3.7.3
3.7.4
3.7.5
3.7.6
3.8.0
3.9.0
3.10.0
3.10.1
3.11.0
3.11.1
3.11.2
3.11.3
3.12.0
3.13.0
3.13.1
3.13.2
3.14.0
3.14.1
3.15.0
3.16.0
3.17.0
3.17.1
3.18.0
3.19.0
3.19.1
3.19.2
3.19.3
3.20.0
3.21.0
3.21.1
3.21.2
3.21.3
3.22.0
3.22.1
3.22.2
3.23.0
3.23.1
3.24.0
3.24.1
3.24.2
3.24.3
3.24.4
3.24.5
3.24.6
3.24.7
3.25.0
3.25.1
3.25.2
3.26.0
3.27.0
3.27.1
3.27.2
3.27.3
3.27.4
3.27.5
3.27.6
3.27.7
3.27.8
3.28.0
3.29.0
3.29.1
3.29.2
3.29.3
3.30.0
3.30.1
3.31.0
3.31.1
3.31.2
3.31.3
3.32.0
3.32.1
3.32.2
3.32.3
3.33.0
3.33.1
3.33.2
3.33.3

Database specific

source 
"https://cna.erlef.org/osv/EEF-CVE-2026-86338.json"

Git / github.com/ash-project/ash

Affected ranges

Type
GIT
Repo
https://github.com/ash-project/ash
Events
Introduced
0b6d93c7c4637280b46ae66ea1d2eaf013701238
Fixed
b3d4503241f3deacb5ceb955e10a4fa927da0f67

Affected versions

3.*
3.0.3
3.4.56
v2.*
v2.11.0
v2.11.0-rc.0
v2.11.0-rc.1
v2.11.0-rc.2
v2.11.0-rc.3
v2.11.1
v2.11.10
v2.11.11
v2.11.2
v2.11.3
v2.11.4
v2.11.5
v2.11.6
v2.11.7
v2.11.8
v2.11.9
v2.12.0
v2.12.1
v2.13.0
v2.13.1
v2.13.2
v2.13.3
v2.13.4
v2.14.0
v2.14.1
v2.14.10
v2.14.11
v2.14.12
v2.14.13
v2.14.14
v2.14.15
v2.14.16
v2.14.17
v2.14.18
v2.14.19
v2.14.2
v2.14.20
v2.14.21
v2.14.3
v2.14.4
v2.14.5
v2.14.6
v2.14.7
v2.14.8
v2.14.9
v2.15.0
v2.15.1
v2.15.10
v2.15.11
v2.15.12
v2.15.13
v2.15.14
v2.15.15
v2.15.16
v2.15.17
v2.15.18
v2.15.19
v2.15.2
v2.15.20
v2.15.3
v2.15.4
v2.15.5
v2.15.6
v2.15.7
v2.15.8
v2.15.9
v2.16.0
v2.16.1
v2.17.0
v2.17.1
v2.17.10
v2.17.11
v2.17.12
v2.17.13
v2.17.14
v2.17.15
v2.17.16
v2.17.17
v2.17.18
v2.17.19
v2.17.2
v2.17.20
v2.17.21
v2.17.22
v2.17.23
v2.17.24
v2.17.3
v2.17.4
v2.17.5
v2.17.6
v2.17.7
v2.17.8
v2.17.9
v2.18.0
v2.18.1
v2.18.2
v2.19.0
v2.19.1
v2.19.10
v2.19.11
v2.19.12
v2.19.13
v2.19.14
v2.19.2
v2.19.3
v2.19.4
v2.19.5
v2.19.6
v2.19.7
v2.19.8
v2.19.9
v2.20.0
v2.20.1
v2.20.2
v2.20.3
v2.21.0
v2.21.1
v2.21.2
v3.*
v3.0.0-rc.0
v3.0.0-rc.1
v3.0.0-rc.10
v3.0.0-rc.11
v3.0.0-rc.12
v3.0.0-rc.13
v3.0.0-rc.14
v3.0.0-rc.15
v3.0.0-rc.16
v3.0.0-rc.17
v3.0.0-rc.18
v3.0.0-rc.19
v3.0.0-rc.2
v3.0.0-rc.20
v3.0.0-rc.21
v3.0.0-rc.22
v3.0.0-rc.23
v3.0.0-rc.24
v3.0.0-rc.25
v3.0.0-rc.26
v3.0.0-rc.27
v3.0.0-rc.29
v3.0.0-rc.3
v3.0.0-rc.30
v3.0.0-rc.31
v3.0.0-rc.32
v3.0.0-rc.33
v3.0.0-rc.34
v3.0.0-rc.35
v3.0.0-rc.36
v3.0.0-rc.37
v3.0.0-rc.38
v3.0.0-rc.4
v3.0.0-rc.40
v3.0.0-rc.41
v3.0.0-rc.42
v3.0.0-rc.43
v3.0.0-rc.44
v3.0.0-rc.45
v3.0.0-rc.46
v3.0.0-rc.5
v3.0.0-rc.6
v3.0.0-rc.7
v3.0.0-rc.8
v3.0.0-rc.9
v3.0.1
v3.0.10
v3.0.11
v3.0.12
v3.0.13
v3.0.14
v3.0.15
v3.0.16
v3.0.2
v3.0.3
v3.0.4
v3.0.5
v3.0.6
v3.0.7
v3.0.8
v3.0.9
v3.1.1
v3.1.5
v3.1.6
v3.1.7
v3.1.8
v3.10.0
v3.10.1
v3.11.0
v3.11.1
v3.11.2
v3.11.3
v3.12.0
v3.13.0
v3.13.1
v3.13.2
v3.14.0
v3.14.1
v3.15.0
v3.16.0
v3.17.0
v3.17.1
v3.18.0
v3.19.0
v3.19.1
v3.19.2
v3.19.3
v3.2.1
v3.2.2
v3.2.3
v3.2.4
v3.2.5
v3.2.6
v3.20.0
v3.21.0
v3.21.1
v3.21.2
v3.21.3
v3.22.0
v3.22.1
v3.22.2
v3.23.0
v3.23.1
v3.24.0
v3.24.1
v3.24.2
v3.24.3
v3.24.4
v3.24.5
v3.24.6
v3.24.7
v3.25.0
v3.25.1
v3.25.2
v3.26.0
v3.27.0
v3.27.1
v3.27.2
v3.27.3
v3.27.4
v3.27.6
v3.27.7
v3.27.8
v3.28.0
v3.29.0
v3.29.1
v3.29.2
v3.29.3
v3.3.0
v3.3.1
v3.3.2
v3.3.3
v3.30.0
v3.30.1
v3.31.0
v3.31.1
v3.31.2
v3.31.3
v3.32.1
v3.32.2
v3.32.3
v3.33.1
v3.33.2
v3.33.3
v3.4.1
v3.4.10
v3.4.11
v3.4.12
v3.4.13
v3.4.14
v3.4.15
v3.4.16
v3.4.17
v3.4.18
v3.4.19
v3.4.2
v3.4.20
v3.4.21
v3.4.23
v3.4.24
v3.4.25
v3.4.26
v3.4.27
v3.4.28
v3.4.29
v3.4.3
v3.4.30
v3.4.31
v3.4.32
v3.4.33
v3.4.34
v3.4.35
v3.4.36
v3.4.37
v3.4.38
v3.4.39
v3.4.4
v3.4.40
v3.4.41
v3.4.42
v3.4.43
v3.4.44
v3.4.45
v3.4.46
v3.4.47
v3.4.48
v3.4.5
v3.4.50
v3.4.51
v3.4.53
v3.4.54
v3.4.55
v3.4.56
v3.4.57
v3.4.58
v3.4.59
v3.4.6
v3.4.61
v3.4.62
v3.4.63
v3.4.64
v3.4.65
v3.4.66
v3.4.67
v3.4.68
v3.4.69
v3.4.7
v3.4.70
v3.4.71
v3.4.72
v3.4.73
v3.4.8
v3.4.9
v3.5.1
v3.5.10
v3.5.11
v3.5.12
v3.5.13
v3.5.14
v3.5.15
v3.5.16
v3.5.17
v3.5.18
v3.5.19
v3.5.2
v3.5.21
v3.5.22
v3.5.23
v3.5.24
v3.5.25
v3.5.26
v3.5.27
v3.5.28
v3.5.29
v3.5.3
v3.5.30
v3.5.31
v3.5.32
v3.5.33
v3.5.35
v3.5.36
v3.5.37
v3.5.38
v3.5.39
v3.5.4
v3.5.41
v3.5.42
v3.5.43
v3.5.5
v3.5.6
v3.5.7
v3.5.8
v3.6.0
v3.6.1
v3.6.2
v3.6.3
v3.7.0
v3.7.1
v3.7.2
v3.7.3
v3.7.4
v3.7.5
v3.7.6
v3.8.0
v3.9.0

Database specific

source 
"https://cna.erlef.org/osv/EEF-CVE-2026-86338.json"