Borg Backup Server

v2.55.2 Feature

This release adds 2 notable features for engineering teams evaluating rollout.

Published 8d Backup & Recovery

✓ No known CVEs patched

✓ No known CVEs patched in this version

Topics

backup backup-manager borg-backup borgbackup borgbackup-gui borgbackup-web-ui

+2 more

self-hosted web-gui

Affected surfaces

auth rbac

Summary

AI summary

Added API endpoints for maintenance mode control and S3 credentials reading.

Type	Severity	Summary	CVE
Feature
Feature	Medium	Adds GET and POST endpoints for server maintenance mode control. Adds GET and POST endpoints for server maintenance mode control. Source: llm_adapter@2026-05-26 Confidence: high	—
Feature	Medium	Adds GET endpoint to read global S3 off-site sync configuration. Adds GET endpoint to read global S3 off-site sync configuration. Source: llm_adapter@2026-05-26 Confidence: high	—
Feature	Low	Agents auto-update to version 2.55.2 on next poll. Agents auto-update to version 2.55.2 on next poll. Source: llm_adapter@2026-05-26 Confidence: high	—

Full changelog

GET /api/v1/maintenance / POST /api/v1/maintenance — read or toggle the server's maintenance-mode flag from the API. Useful for automation that needs to pause the queue during planned work (CI upgrades, manual restores, etc.).
GET /api/v1/s3-credentials — read the global S3 off-site sync configuration (endpoint, region, bucket, access key, secret key, path prefix, plus a configured boolean). Same access level as the Settings UI.

Both endpoints take an admin API token (Authorization: Bearer bbs_tok_...).

Documented in the API wiki page.

sudo /var/www/bbs/bin/bbs-update /var/www/bbs

Agents auto-update to 2.55.2 on their next poll.

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