What is CVE-2026-77810?

CVE-2026-77810 is a critical-severity vulnerability in AWS Athena Federated Query Neptune Connector, classified under Eval Injection. CVSS score: 9.9/10. Published 2026-08-21.

How severe is CVE-2026-77810?

Critical severity. CVSS v3 base score is 9.9 out of 10.

RCE in AWS Athena Federated Query Neptune Connector

CVE-2026-77810

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.

Published 2026-08-21 · last modified 2026-08-27.

CVSS v3 metric

CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (48.3th percentile), scored 2026-10-06.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 48.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.006 · change: +0.003

Affected products

AWS Athena Federated Query Neptune Connector

Weakness classification (CWE)

CWE-95 — Eval Injection

References

ff89ba41-3aa1-4d27-914a-91399e9639e5 (patch)
ff89ba41-3aa1-4d27-914a-91399e9639e5 (vendor-advisory)
ff89ba41-3aa1-4d27-914a-91399e9639e5 (third-party-advisory)

Frequently asked questions

What is CVE-2026-77810?: CVE-2026-77810 is a critical-severity vulnerability in AWS Athena Federated Query Neptune Connector, classified under Eval Injection. CVSS score: 9.9/10. Published 2026-08-21.
How severe is CVE-2026-77810?: Critical severity. CVSS v3 base score is 9.9 out of 10.