Kallidus Outage History

Summary Between 08:00 and 09:46 BST on 30 July 2026, HR customers using the Absence Management functionality were unable to access their Kallidus HR system. Customers not using Absence Management were unaffected. Root Cause During a scheduled maintenance window, Kallidus' cloud hosting provider performed maintenance on infrastructure supporting the Kallidus HR Absence Management databases. The maintenance activity exceeded its planned duration, resulting in the databases remaining unavailable beyond the scheduled maintenance window. Kallidus has escalated the incident with its cloud hosting provider and requested a detailed review of the maintenance overrun. This RCA will be updated should additional information become available. We apologise for the disruption caused and thank our customers for their patience while the issue was resolved.

From 11:33 BST on 27/05 until 09:30 BST on 29/05, Learn administrators were unable to replace content using the course import process. Uploading new content continued to operate normally; only content replacement was affected. The issue was caused by missing permissions within an Azure storage container following the decommissioning of an older container on 27/05. During the investigation, a recent deployment was initially rolled back as a precautionary measure, however this did not resolve the issue as the root cause was related to storage permissions rather than a code change. Once the missing permissions were identified, they were restored and content replacement functionality was confirmed as operational. Although this was an isolated incident and is unlikely to recur, we have taken additional preventative action by introducing automated testing specifically for this scenario to complement the upload tests already in place.

Summary: Between 08:49 and 09:35 GMT on 02/01/2026, UK customers may have encountered errors accessing Kallidus products. Root cause: A critical SSL certificate expired. Kallidus engineers discovered that an automation, responsible for the renewal of SSL certificates, was failing on one of two devices configured to perform the task. Stopping the problem device resolved the issue. Kallidus engineers will be making a number of enhancements to the certificate renewal process in a bid to prevent such an issue from occurring in future. We apologise for any inconvenience caused by this disruption and thank you for your patience while the issue was resolved.

On 09 December 2025, between 16:44 and 16:58 GMT, some Learn customers may have experienced errors when trying to access the product. Root Cause: Our team identified that one of our database servers stopped responding. As soon as this occurred, our monitoring systems alerted us, enabling our engineers to quickly investigate and restart the affected server. We resolved this promptly, and services returned to normal. We sincerely apologise for any inconvenience this may have caused and appreciate your patience while we worked to restore full functionality.

Between 09:17 and 20:30 GMT on 23-10-2025 our Talent and 360 applications experienced a period of downtime while we investigated and addressed a newly discovered security vulnerability. Root Cause: We identified an exploitable vulnerability in one of our application components. A thorough investigation indicated that no customer data was accessed, exposed or compromised via this method. Upon discovery we immediately took the system offline to prevent any potential further risk and subsequently conducted a full investigation to identify the root issue and to confirm no data exposure. A permanent security patch was applied to the application code to close the vulnerability. Talent and 360 service was safely restored once we confirmed system integrity and security. As a precaution, we are enhancing internal security scanning and code review processes and expanding our automated vulnerability detection and response capabilities. Thank you for your patience while we resolved this issue.