# CVE-2026-35266: Oracle REST Data Services security vulnerability in Core component

Source: https://junglewise.ai/threats/cve-2026-35266-oracle-rest-data-services-security-vulnerability-in-core  
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-2026-35266 · Severity: high · CVSS 7.9 · Published 2026-05-28

A vulnerability exists in Oracle REST Data Services, a tool used to bridge HTTPS requests to Oracle Databases. A low-privileged attacker could potentially gain full access to sensitive data or modify critical information, though the attack is difficult to perform and requires a legitimate user to interact with a malicious link or site. If successful, this could lead to a significant data breach or a partial disruption of database services.

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-2026-35266 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-35266 being exploited in the wild.

**How severe is CVE-2026-35266?** High severity, with a CVSS score of 7.9, 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-2026-35266?** 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-2026-35266 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-35266?** 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 vulnerability in the Core component of Oracle REST Data Services (versions 24.2.0 through 26.1.0) allows a low-privileged attacker with network access via HTTPS to compromise the system. The vulnerability is characterized by a high attack complexity (AC:H) and requires human interaction (UI:R) from a victim other than the attacker. Due to a scope change (S:C), the exploit may impact products beyond the REST Data Services themselves. Successful exploitation can result in unauthorized creation, deletion, or modification of all accessible data, as well as a partial denial of service. The CVSS vector indicates high impacts to confidentiality and integrity, with a low impact on availability.

## Affected products

- Oracle REST Data Services 24.2.0-26.1.0

## Timeline

- 2026-05-28: disclosed: 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)