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PatchSiren cyber security CVE debrief

CVE-2026-46829 Oracle Corporation CVE debrief

Oracle REST Data Services (ORDS) versions 24.2.0 through 26.1.0 contain an unauthenticated denial-of-service vulnerability in the Mongoapi component. The flaw allows remote attackers to cause complete service unavailability—either hangs or repeatable crashes—via HTTPS requests without authentication. The CVSS 3.1 score of 7.5 reflects high availability impact with low attack complexity and no required privileges or user interaction. This vulnerability was disclosed by Oracle in its May 2026 Critical Patch Update.

Vendor
Oracle Corporation
Product
Oracle REST Data Services
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-05-28
Original CVE updated
2026-07-21
Advisory published
2026-05-28
Advisory updated
2026-07-21

Who should care

Organizations running Oracle REST Data Services versions 24.2.0 through 26.1.0 with the Mongoapi component enabled; database administrators managing ORDS deployments; security teams responsible for Oracle infrastructure patching; compliance officers tracking Critical Patch Update adherence.

Technical summary

The vulnerability exists in the Mongoapi component of Oracle REST Data Services. An unauthenticated attacker can send crafted HTTPS requests that trigger resource exhaustion or fault conditions, resulting in service hangs or crashes. The attack requires no authentication, no user interaction, and is exploitable over the network with low complexity. The complete loss of availability earns a CVSS 3.1 score of 7.5 (HIGH severity).

Defensive priority

HIGH

Recommended defensive actions

  • Apply Oracle Critical Patch Update for May 2026 to affected ORDS deployments immediately.
  • Restrict network access to Oracle REST Data Services Mongoapi endpoints to authorized sources where possible.
  • Monitor ORDS service availability and logs for anomalous HTTPS requests that may indicate exploitation attempts.
  • Validate patch deployment across all instances running versions 24.2.0 through 26.1.0.
  • Review Oracle's security advisory for additional mitigation guidance specific to your deployment configuration.

Evidence notes

Oracle's official security advisory confirms affected versions (24.2.0-26.1.0), attack vector (HTTPS), and impact (complete DoS). NVD entry corroborates CVSS 3.1 scoring and vector. No KEV listing or known ransomware campaign use is documented.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-46829 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-46829

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-46829 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-46829

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.