CVE-2026-81643

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Source
https://cve.org/CVERecord?id=CVE-2026-81643
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-81643.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-81643
Aliases
Published
2026-08-30T18:20:35.564Z
Modified
2026-08-31T03:45:43.198446275Z
Severity
  • 2.3 (Low) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
Broken access control in AshGraphql subscription batcher applies authorization suppression to only the first notification
Details

Incorrect Authorization vulnerability in ash-project ash_graphql delivers GraphQL subscription payloads for records a subscriber is not authorized to see.

In AshGraphql.Subscription.Batcher, dosend/5 resolves the first notification of a batch and filters it with shouldsend?/1, which drops results whose errors are coded forbidden or notfound or carry no code, precisely so that unauthorized results are not disclosed. The remaining notifications in the batch are read from the process dictionary, re-run through the pipeline, and appended to the outgoing results without that filter. They reach pubsub.publishsubscription/2, and the not isnil(record) guard drops only nil records, not error-carrying results. Any two qualifying notifications arriving within the default one-second batch interval suffice, and batching is the default path. The fix applies shouldsend?/1 to the whole batch.

This issue affects ash_graphql: from 1.4.0 before 1.11.0.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81643.json",
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "introduced": "3cb2c9870d050c7c4bba6c211aaed97d732f7e81"
                },
                {
                    "fixed": "e8e67f39add2ce0771e6db5f086afe68ba212c57"
                }
            ]
        }
    ],
    "cwe_ids": [
        "CWE-863"
    ],
    "cna_assigner": "EEF"
}
References

Affected packages

Git / github.com/ash-project/ash_graphql

Affected ranges

Type
GIT
Repo
https://github.com/ash-project/ash_graphql
Events
Introduced
cb2296922d48705a7bbabd92daa1ec240cab1e66
Fixed
4e2c5476ecfd2c701488627ee46e6eefc58c982e
Database specific
Show details 
{
    "source": "AFFECTED_FIELD",
    "extracted_events": [
        {
            "introduced": "1.4.0"
        },
        {
            "fixed": "1.11.0"
        }
    ]
}

Affected versions

v1.*
v1.10.0
v1.10.1
v1.4.0
v1.4.1
v1.4.2
v1.4.3
v1.4.4
v1.4.6
v1.4.7
v1.5.0
v1.5.1
v1.6.0
v1.7.0
v1.7.1
v1.7.10
v1.7.11
v1.7.12
v1.7.13
v1.7.14
v1.7.15
v1.7.16
v1.7.17
v1.7.2
v1.7.3
v1.7.4
v1.7.5
v1.7.6
v1.7.7
v1.7.8
v1.7.9
v1.8.0
v1.8.1
v1.8.2
v1.8.3
v1.8.4
v1.8.5
v1.9.0
v1.9.1
v1.9.2
v1.9.3
v1.9.4

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-81643.json"