# CVE-2026-46839: Oracle REST Data Services takeover in Core component

Source: https://junglewise.ai/threats/cve-2026-46839-oracle-rest-data-services-takeover-in-core-component  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-05-28. Updated: 2026-05-28  
License: CC BY 4.0 with a link back

CVE-2026-46839 · Severity: critical · CVSS 9.9 · Published 2026-05-28

Oracle REST Data Services, a tool that enables developers to use HTTP(S) and REST to work with Oracle Databases, contains a critical security vulnerability in its core component. A user with even low-level access to the network can exploit this flaw to take complete control of the service. Because this tool connects directly to database environments, a successful attack could lead to widespread data theft, service disruption, and potential unauthorized access to connected systems.

Technologies: [Oracle REST Data Services](https://junglewise.ai/threats/technologies/rest-data-services). Vendors: [Oracle](https://junglewise.ai/threats/vendors/oracle).

## Quick answers

**Is CVE-2026-46839 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-46839 being exploited in the wild.

**How severe is CVE-2026-46839?** Critical severity, with a CVSS score of 9.9, published 28 May 2026.

**Which products and versions are affected?** Oracle REST Data Services 24.2.0-26.1.0.

**Is there a fix for CVE-2026-46839?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-46839 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-46839?** Check whether you run Oracle REST Data Services at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A critical vulnerability exists in the Core component of Oracle REST Data Services (ORDS) versions 24.2.0 through 26.1.0. The flaw is categorized as easily exploitable and allows a low-privileged attacker with network access via HTTPS to compromise the service. Notably, the vulnerability includes a 'scope change' (S:C), indicating that an exploit can impact components beyond the ORDS environment itself, potentially affecting the underlying database or integrated Oracle products. Successful exploitation results in a complete takeover of the ORDS instance, impacting confidentiality, integrity, and availability. Users are advised to consult the Oracle May 2026 security alert for patching information.

## Affected products

- Oracle REST Data Services 24.2.0-26.1.0

## Timeline

- 2026-05-28: advisory: Initial disclosure by Oracle and NVD publication

## References

- [https://www.oracle.com/security-alerts/cspumay2026.html](https://www.oracle.com/security-alerts/cspumay2026.html)

## Related threats

- [Oracle REST Data Services remote code execution](https://junglewise.ai/threats/cve-2026-91610-vulnerability-in-oracle-rest-data-services-component-general)
- [Oracle REST Data Services authentication bypass in GraphQL](https://junglewise.ai/threats/cve-2026-91609-vulnerability-in-oracle-rest-data-services-component-graph-ql)
- [Oracle REST Data Services authentication bypass in Core](https://junglewise.ai/threats/cve-2026-101494-vulnerability-in-oracle-rest-data-services-component-core)
- [Oracle REST Data Services unauthorized data access in Core](https://junglewise.ai/threats/cve-2026-101493-vulnerability-in-oracle-rest-data-services-component-core)
- [Oracle REST Data Services data access bypass in Core](https://junglewise.ai/threats/cve-2026-101386-vulnerability-in-oracle-rest-data-services-component-core)