Live Exposure Defense: From CVE to Confirmed Exposure in 12 Hours – See more

Back
New CVE Detected

CVE-2026-73931 – Unauthenticated Data Manipulation & Partial DoS – Oracle Helidon 4.5.3 (Imperative

Be the first to know when new zero-days emerge:

Subscribe to Email Alerts
Subscribe to RSS Feed

Summary

CVE-2026-73931 is a high-severity (CVSS 8.3) vulnerability affecting the Imperative Web Server component of Oracle Helidon. The flaw allows a remote, unauthenticated attacker with network access via HTTP to gain unauthorized read access as well as insert, update, and delete access to some Helidon-accessible data, and can also cause a partial denial of service. Because the vulnerability has a CVSS scope change (S:C), a successful attack against Helidon may impact resources beyond the vulnerable component itself.

Technical details

  • Root cause: A flaw in the Imperative Web Server component of Oracle Helidon that fails to properly restrict access to data operations exposed over HTTP.
  • Trigger conditions: An attacker needs only network access to the exposed Helidon HTTP endpoint — no authentication and no user interaction are required to exploit the flaw.
  • Attack vector: Network (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N).
  • Impact: Unauthorized read access to data, unauthorized insert/update/delete of some Helidon-accessible data, and partial denial of service; the CVSS scope change indicates the impact may extend to components beyond the vulnerable server itself.

Affected software

  • Oracle Helidon version 4.5.3

Severity

  • CVSS v3.1 Base Score: 8.3 (High)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L

Mitigation and recommended actions

  • Immediate: Apply the fix provided by Oracle for this vulnerability, released as part of the Oracle Critical Security Patch Update (CSPU) for August 2026. Organizations running Oracle Helidon 4.5.3 should upgrade to the version specified in Oracle’s August 2026 security alert as soon as possible.
  • If patching cannot be performed immediately: Restrict network exposure of the Helidon Imperative Web Server component to trusted networks only (e.g., via firewall rules, network segmentation, or placing it behind an authenticated reverse proxy/gateway) until the patch can be applied, since the vulnerability requires only network access and no authentication to exploit.
  • Monitor Helidon-exposed HTTP endpoints for unexpected data modification requests or anomalous traffic patterns as an interim detection measure.

References

Are you exposed?

Get a free report of your organization’s exposure to this CVE and threat

  • Mapping of all Assets with this Technology
  • Identification of potentially exposed assets to this CVE
  • Confirmation of verified exploitable assets
Get Exposure Report

How IONIX’s External Exposure Management Platform Detects and Validates
Zero-Days to Shrink MTTR

1

Map your entire attack surface (continously)

IONIX uses multi-factor discovery methods, including DNS analysis, certificate mapping, metadata inspection, and more, to automatically map every internet-facing asset across your environment. This includes cloud instances, third-party platforms, shadow IT, and even forgotten infrastructure that traditional tools miss.

2

Monitor for new CVEs

Dozens of threat intel feeds using agentic technology are continuously analyzed to detect the appearance of proof-of-concept code, exploit kits, and indicators of active targeting. IONIX goes further by applying AI to proactively evaluate whether emerging vulnerabilities are likely to be exploited, even before PoCs go public.

3

Identify Potential External Exposures

Not all CVEs matter. IONIX filters vulnerabilities by asking attacker-centric questions: Can it be reached from the internet? Does it require authentication? Is it being exploited in the wild? This dramatically reduces noise and focuses teams on threats that can actually be weaponized.

4

Create Safe, Scalable Exploit Validations

IONIX transforms real-world PoCs into safe, non-intrusive test payloads that can be run in production environments without disruption. These simulations are precisely targeted to the systems that are vulnerable, ensuring rapid validation without unnecessary load.

5

Execute Exploit Validations

By combining context about software stack, versioning, exposure status, and reachability, IONIX ensures that only the right payloads are executed against the right assets, maximizing efficiency and minimizing risk.

6

Drive Fast and Actionable Remediation

Results are routed through integrations with ticketing, SOAR, and SIEM tools. Issues are written in plain language, bundled into remediation clusters, and prioritized based on asset criticality, exploitability, and blast radius. This shortens mean time to remediation (MTTR) and empowers teams to act with confidence.

Are you exposed?

Get a free report of your organization’s exposure to this CVE and threat

  • Mapping of all Assets with this Technology
  • Identification of potentially exposed assets to this CVE
  • Confirmation of verified exploitable assets
Get Exposure Report
Close

Subscribe to Threat Center RSS

Copy/paste the link below into your preferred RSS reader or follow these instructions to subscribe to Slack alerts.

Open RSS feedSlack setup instructions

Close

Get Real-Time CVE Alerts to Your Email

Be the first to know when new zero-days emerge