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
2026-08-30T18:20:35Z
Modified
2026-09-03T03:30:45Z
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, do_send/5 resolves the first notification of a batch and filters it with should_send?/1, which drops results whose errors are coded forbidden or not_found 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.publish_subscription/2, and the not is_nil(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 should_send?/1 to the whole batch.

This issue affects ash_graphql: from 1.4.0 before 1.11.0.

Database specific 
{
    "cna_assigner": "EEF",
    "cwe_ids": [
        "CWE-863"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81643.json",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "introduced": "3cb2c9870d050c7c4bba6c211aaed97d732f7e81"
                },
                {
                    "fixed": "e8e67f39add2ce0771e6db5f086afe68ba212c57"
                }
            ],
            "source": "AFFECTED_FIELD"
        }
    ]
}
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
Fixed
e8e67f39add2ce0771e6db5f086afe68ba212c57
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "1.4.0"
        },
        {
            "fixed": "1.11.0"
        }
    ],
    "source": [
        "DESCRIPTION",
        "REFERENCES"
    ]
}

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"