CVE-2026-40906

Description

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 contents of the underlying PostgreSQL database through crafted ORDER BY expressions. This vulnerability is fixed in 1.5.0.

CVSS v3.1 Score

9.9

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

EPSS — Exploit Prediction

0.0003

Probability of exploitation

0.09%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-89 SQL Injection

Affected Products

Vendor	Product	Versions
electric	sync-service	1.1.12 — 1.5.0

References

Advisories & Patches

https://github.com/electric-sql/electric/security/advisories/GHSA-h5rg-pxx7-r2hj https://github.com/electric-sql/electric/security/advisories/GHSA-h5rg-pxx7-r2hj

Exploits

https://github.com/electric-sql/electric/pull/4081 https://github.com/electric-sql/electric/security/advisories/GHSA-h5rg-pxx7-r2hj https://github.com/electric-sql/electric/security/advisories/GHSA-h5rg-pxx7-r2hj

Frequently Asked Questions

What is 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 contents of the underlying PostgreSQL database through crafted ORDER BY expressions. This vulnerability is fixed in 1.5.0. It has a CVSS v3.1 base score of 9.9 (CRITICAL).

How severe is CVE-2026-40906? +

CVE-2026-40906 has a CVSS v3.1 score of 9.9 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately. The EPSS score is 0.0003, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-40906? +

CVE-2026-40906 affects products from electric, specifically: sync-service. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-40906? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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