CVE-2026-8495 Drupal CVE debrief

Who should care

Drupal administrators, site owners, and security teams responsible for environments using Date iCal. This is especially important for sites exposing calendar, feed, or other content endpoints where authorization is expected to restrict access.

Technical summary

The issue is described as a missing authorization weakness that permits forceful browsing, which maps to CWE-862. In practical terms, this means access control checks are insufficient or bypassable for some Date iCal resources, potentially allowing unauthenticated users to retrieve restricted information or interact with protected functionality. The provided CVSS vector is AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H, indicating remote exploitation without authentication or user interaction and potentially severe confidentiality, integrity, and availability impact. The affected range is Date iCal from 0.0.0 before 4.0.15, with remediation indicated by upgrading to 4.0.15 or later.

Defensive priority

Urgent. The combination of missing authorization, network reachability, no privileges required, and critical impact makes this a high-priority remediation item for any exposed Drupal Date iCal deployment.

Recommended defensive actions

• Upgrade Drupal Date iCal to version 4.0.15 or later as soon as possible.
• Inventory all Drupal instances to confirm whether Date iCal is installed and whether vulnerable versions are in use.
• Review any exposed calendar or feed endpoints for unintended public access and validate authorization controls.
• Restrict exposure of affected functionality until patching is complete, especially on internet-facing sites.
• Check application and web access logs for unexpected requests to Date iCal-related resources after the advisory date.
• Re-test access controls after remediation to confirm unauthorized browsing is no longer possible.

Evidence notes

This debrief is based only on the supplied CVE/NVD record and the referenced Drupal.org advisory. The record lists the issue as a missing authorization vulnerability enabling forceful browsing, with weakness CWE-862 and a critical CVSS 3.1 vector of AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. The affected version range is stated as Date iCal from 0.0.0 before 4.0.15. NVD marked the record as undergoing analysis at the time of the supplied modified timestamp.

Sources and 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.