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CVE-2026-73878 Oracle CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-18T21:18:20.163Z and has not been modified since then. The CVE-2026-73878 vulnerability affects Helidon version 3.2.18, allowing unauthenticated attackers with network access via HTTP to compromise Helidon, potentially leading to unauthorized access to critical data. Further analysis is needed to fully understand the vulnerability's impact and verify affected systems. Helidon users should verify their deployments and assess their exposure. The vulnerability is in the Imperative Web Server component of Oracle Fusion Middleware. The CVSS 3.1 Base Score is 7.5, indicating high severity with confidentiality impacts.

Vendor
Oracle
Product
Helidon
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-18
Original CVE updated
2026-08-25
Advisory published
2026-08-18
Advisory updated
2026-08-25

Who should care

Users of Helidon version 3.2.18, administrators of Oracle Fusion Middleware, security teams responsible for vulnerability management, and operators managing affected deployments should prioritize patching and review their exposure to this vulnerability.

Technical summary

CVE-2026-73878 is a vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). The supported version that is affected is 3.2.18. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Helidon accessible data. CVSS 3.1 Base Score 7.5 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).

Defensive priority

Helidon users should prioritize patching to prevent unauthorized data access.

Recommended defensive actions

  • Apply patches or updates provided by Oracle to vulnerable Helidon instances.
  • Restrict network access to Helidon instances to minimize attack surface.
  • Monitor Helidon instances for suspicious activity.
  • Review compensating controls for exposed systems while remediation is scheduled and verified.
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review.
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented.
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.

Evidence notes

The CVE-2026-73878 vulnerability affects Helidon version 3.2.18, allowing unauthenticated attackers with network access via HTTP to compromise Helidon, potentially leading to unauthorized access to critical data. Further analysis is needed to fully understand the vulnerability's impact and verify affected systems. Helidon users should verify their deployments and assess their exposure.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-73878 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-73878

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

  • CVE-2026-73878 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-73878

    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.