What is CVE-2026-40906?

CVE-2026-40906 is a critical-severity vulnerability in Electric Sync-service, classified under SQL Injection. CVSS score: 9.9/10. Published 2026-04-21.

How severe is CVE-2026-40906?

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

SQL Injection in Electric Sync-service

CVE-2026-40906

Electric is a Postgres sync engine. From 1.1.12 to before 1.5.0, the order_by parameter in the ElectricSQL /v1/shape API is vulnerable to error-based SQL injection, allowing any authenticated user to read, write, and destroy the full conte…

Vulnerability class: SQL Injection

EPSS: 0.000 (10.6th percentile) — read the EPSS interpretation.

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.

Affected products

Electric Sync-service
Electric-sql Electric — versions >= 1.1.12, < 1.5.0

Weakness classification (CWE)

CWE-89 — SQL Injection

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
security-advisories@github.com (Exploit, x_refsource_MISC, Issue Tracking)

Frequently asked questions

What is CVE-2026-40906?: CVE-2026-40906 is a critical-severity vulnerability in Electric Sync-service, classified under SQL Injection. CVSS score: 9.9/10. Published 2026-04-21.
How severe is CVE-2026-40906?: Critical severity. CVSS v3 base score is 9.9 out of 10.