release-history/drupal/current endpoint returns "No release history" error (December 2025)

Problem/Motivation

The Update API endpoint https://updates.drupal.org/release-history/drupal/current is returning an error instead of the Drupal core release history. This causes the Update module and Package Manager module to fail when checking for Drupal core updates.

Error Response:

<?xml version="1.0" encoding="utf-8"?>
No release history was found for the requested project (drupal).

This appears to be the same issue that was reported and supposedly fixed in August 2024 (see #3470260).

Steps to Reproduce
Run: curl https://updates.drupal.org/release-history/drupal/current
Observe the error response instead of valid XML release data

Expected Behavior
The endpoint should return valid XML with Drupal core release information, similar to:

https://updates.drupal.org/release-history/drupal/all (works correctly)
https://updates.drupal.org/release-history/token/current (works correctly for contrib)

Actual Behavior
https://updates.drupal.org/release-history/drupal/current → Error
https://updates.drupal.org/release-history/drupal/11.x → Error
https://updates.drupal.org/release-history/drupal/all → Works

Impact
This causes the following issues on Drupal sites:

1. Update module: Shows “No available releases found” for Drupal core
2. Package Manager module: Throws PHP warnings:

Warning: Undefined array key "project_status" in 
Drupal\package_manager\ProjectInfo->getInstallableReleases() 
(line 96 of core/modules/package_manager/src/ProjectInfo.php)

1. Automatic Updates module: Cannot function properly due to missing release data
2. Status report: Shows errors preventing administrators from viewing system status

Environment

• Drupal CMS 1.2.8 (Drupal Core 11.3.1)
• PHP 8.3.25
• Date observed: December 25, 2025

Workaround
Currently, the only workaround is to:

1. Uninstall automatic_updates and package_manager modules
2. Use Composer for update checks: composer outdated "drupal/*"

Related Issues
#3470230: No available releases found
#3470260: No release history was found for the requested project (Drupal) - marked as fixed in August 2024