CVE-2026-62508: Oracle Time and Labor DOS Vulnerability

CVE-2026-62508 Overview

CVE-2026-62508 is a denial of service vulnerability in the Oracle Time and Labor product of Oracle E-Business Suite, specifically within the Internal Operations component. The flaw affects supported versions 12.2.3 through 12.2.15. An authenticated attacker with low privileges and network access via HTTP can exploit the issue to cause a partial denial of service. The vulnerability maps to [CWE-400] Uncontrolled Resource Consumption. Oracle addressed the issue in the July 2026 Critical Patch Update.

Critical Impact
A low-privileged, network-adjacent attacker can trigger a partial denial of service condition in Oracle Time and Labor, degrading availability of workforce management functions.

Affected Products

Oracle E-Business Suite - Oracle Time and Labor 12.2.3 through 12.2.15
Component: Internal Operations
Deployments exposing HTTP interfaces to authenticated users

Discovery Timeline

2026-07-21 - CVE-2026-62508 published to NVD
2026-07-22 - Last updated in NVD database
July 2026 - Oracle releases fix in the Oracle Critical Patch Update Advisory - July 2026

Technical Details for CVE-2026-62508

Vulnerability Analysis

The vulnerability resides in the Internal Operations component of Oracle Time and Labor, part of the broader Oracle E-Business Suite. The weakness is classified under [CWE-400] Uncontrolled Resource Consumption. Exploitation requires an authenticated session with low privileges and network reachability to the affected HTTP endpoint. Successful attacks do not compromise data confidentiality or integrity. The impact is limited to availability, and only a partial denial of service condition can be induced.

Exploitation complexity is high. An attacker must satisfy specific runtime conditions to trigger the resource exhaustion pathway, which limits opportunistic abuse. The affected version range spans 12.2.3 through 12.2.15, indicating a long-standing code path within the Time and Labor module.

Root Cause

The root cause is uncontrolled consumption of a bounded resource within the Internal Operations processing logic. When invoked under specific conditions, the code path fails to enforce limits on resource allocation, leading to degraded service response. Oracle has not published component-level technical details beyond the advisory.

Attack Vector

The attack vector is Network via HTTP. The attacker must hold a valid low-privilege account within the Oracle E-Business Suite environment. No user interaction is required. Because exploitation only yields a partial denial of service and requires authentication plus high attack complexity, the scoring reflects a low-risk profile. No public proof-of-concept code, exploit modules, or in-the-wild exploitation have been reported.

Detection Methods for CVE-2026-62508

Indicators of Compromise

Repeated or malformed HTTP requests from authenticated user sessions targeting Oracle Time and Labor Internal Operations endpoints
Sudden spikes in CPU, memory, or database session utilization on Oracle E-Business Suite middle-tier or database servers
HTTP 500 responses, timeouts, or elongated response times originating from Time and Labor URLs

Detection Strategies

Baseline normal request patterns for Oracle Time and Labor endpoints and alert on statistical deviations per authenticated user
Correlate Oracle E-Business Suite application logs with web server access logs to identify low-privilege accounts issuing anomalous request volumes
Monitor Oracle database wait events and long-running sessions tied to the Time and Labor schema

Monitoring Recommendations

Enable and centralize Oracle E-Business Suite audit logs, Apache/OHS access logs, and database session metrics
Configure alerting thresholds for concurrent session counts and response latency on Time and Labor URLs
Review privileged and low-privilege account activity for unexpected access to Internal Operations functionality

How to Mitigate CVE-2026-62508

Immediate Actions Required

Apply the July 2026 Oracle Critical Patch Update for Oracle E-Business Suite as documented in the Oracle Security Alert July 2026
Inventory all Oracle E-Business Suite instances running Time and Labor versions 12.2.3 through 12.2.15
Restrict network access to Oracle E-Business Suite HTTP endpoints to trusted internal segments

Patch Information

Oracle addressed CVE-2026-62508 in the July 2026 Critical Patch Update. Administrators should follow the patch application steps in the advisory and validate deployment across development, test, and production environments. Refer to the Oracle Critical Patch Update Advisory - July 2026 for patch identifiers and installation instructions.

Workarounds

Enforce least-privilege access so only required users hold Time and Labor responsibilities
Deploy web application firewall rules to rate-limit requests to Internal Operations endpoints per authenticated session
Isolate the Oracle E-Business Suite application tier from untrusted networks and require VPN or zero-trust access

bash

# Example: rate-limit requests to Oracle Time and Labor endpoints using an upstream reverse proxy
# nginx snippet - adjust zone size and rate to environment capacity
limit_req_zone $binary_remote_addr zone=otl_zone:10m rate=10r/s;

server {
    location /OA_HTML/ {
        limit_req zone=otl_zone burst=20 nodelay;
        proxy_pass http://ebs_backend;
    }
}