CVE-2026-40906
CVE-2026-40906 is a critical-severity vulnerability in Electric Sync-service with a CVSS 3.x base score of 9.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-89.
Key facts
- Severity: Critical (CVSS 3.x base score 9.9)
- EPSS exploit prediction: 0% (37th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-24475
- Weakness: CWE-89
- Affected product: Electric Sync-service
- Published:
- Last modified:
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.
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.
- How severe is CVE-2026-40906?
- CVE-2026-40906 has a CVSS 3.x base score of 9.9, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2026-40906 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-40906?
- CVE-2026-40906 affects Electric Sync-service. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-40906?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- Does CVE-2026-40906 have an EU (EUVD) identifier?
- Yes. CVE-2026-40906 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-24475.
- When was CVE-2026-40906 published?
- CVE-2026-40906 was published on 2026-04-21 and last updated on 2026-06-30.
References
- https://github.com/electric-sql/electric/pull/4081
- https://github.com/electric-sql/electric/security/advisories/GHSA-h5rg-pxx7-r2hj
- https://access.redhat.com/security/cve/CVE-2026-40906
- https://bugzilla.redhat.com/show_bug.cgi?id=2460291
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-40906.json
Affected products (1)
- cpe:2.3:a:electric:sync-service:*:*:*:*:*:*:*:*
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