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NK-WP-0041-T02: diagnose Authelia plus-address filter defect; plan 4.39.28
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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Assistant: claude-code
Assistant-Model: opus
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Assistant-Session: d3d3cea1-869c-44f1-be2a-3d6d3550e72e
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tegwick 2026-09-24 01:26:57 +02:00
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20
workplans/NK-WP-0041-onboarding-journey-usability.md
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@ -59,7 +59,7 @@ to a user; note it here if the password manager still misbehaves.
```task ```task
id: NK-WP-0041-T02 id: NK-WP-0041-T02
status: todo status: progress
priority: medium priority: medium
state_hub_task_id: "83633649-3e5c-57e7-8207-609380a29c25" state_hub_task_id: "83633649-3e5c-57e7-8207-609380a29c25"
``` ```
@ -73,6 +73,24 @@ escapes `+` DN-style inside the filter, and fix it through the reference
configuration or the version. Users who use plus-addressing cannot sign in configuration or the version. Users who use plus-addressing cannot sign in
by email until then. by email until then.
Diagnosis, 2026-09-24. This is an upstream Authelia defect.
`internal/authentication/ldap_util.go` `ldapEscape()` in v4.38.0 through
v4.38.19 (the last 4.38 release) and in v4.39.0 applies `ldap.EscapeFilter`
and then DN-escapes `, # + < > ; " =` as `\c`. Inside a filter, an escape
must be `\XX` hex, so the go-ldap filter compile fails for any username or
email containing one of those eight characters. v4.39.28 (2026-09-17) builds
the filter with `ldap.EscapeFilter(input)` only (`ldap_user_provider.go:720`).
No configuration workaround exists.
Upgrade prepared. The target is `authelia/authelia:4.39.28`, pinned as
`sha256:bd97cff4…`. The live image is the floating tag `4.38`
(`sha256:46021dc2…`). The live `authelia-config` was validated locally with
placeholder secrets under both versions: each returned exit 0 with no errors
and the same set of auto-mapped deprecation warnings. Storage is SQLite on
the PVC, and 4.39 migrates the schema on start. The rollback therefore needs
the pre-upgrade copy (`backups/db.sqlite3.pre-4.39.28`) as well as the old
digest. The daily backups continue.
## Route the portal findings to user-engine ## Route the portal findings to user-engine
```task ```task