Vulnerability · Published Aug 21, 2026 · Assigned by AMZN
CVE-2026-77810Code Injection via Gremlin Query Passthrough in Amazon Athena Neptune Connector
Critical 9.9
In plain English
A critical-severity security flaw in Athena Federated Query Neptune Connector from AWS. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 50% of all known vulnerabilities).
Severity (CVSS 3.1)9.9Critical
Exploit odds (30 days)0.6%top 49.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
In the Neptune connector, a user with access to Neptune through Athena Federated Query could gain access to properties in the Lambda supplying the compute for the connector. To remediate this issue, users should upgrade to aws-athena-query-federation v2026.30.1 or later.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| AWS | Athena Federated Query Neptune Connector | 2024.15.1 – through 2026.28.1 |
Weakness: CWE-95 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H