Critical severity · published Aug 21, 2026
CVE-2026-77810
Code Injection via Gremlin Query Passthrough in Amazon Athena Neptune Connector
9.9
CVSS
0.6%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 50% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AF
Athena Federated Query Neptune Connector · AWS
2024.15.1 through 2026.28.1 · source: vendor
Affected product
AF
Athena Federated Query Neptune Connector
AWS
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-77810
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-77810
aws.amazon.com
https://aws.amazon.com/security/security-bulletins/2026-087-aws/
github.com
https://github.com/awslabs/aws-athena-query-federation/releases/tag/v2026.30.1
github.com
https://github.com/awslabs/aws-athena-query-federation/security/advisories/GHSA-v7c2-5wfg-qg44