Vulnerability · CVE-2026-96627
Arcane: Delegated users:update permission allows admin account takeover via password reset (no privilege-hierarchy check)
Published Oct 16, 2026 · corrected/updated Oct 16, 2026 · evidence confidence high
## Summary A user holding the delegated permission can reset the global administrator's password and take over the admin account. sets the target user's from the request body for ANY target with no comparison of caller-vs-target privilege. Because role assignment and role CRUD are deliberately gated by , is intended to sit BELOW admin (profile management); this finding defeats that separation. ## Root Cause (handler ) loads the target by ID and sets from the request body for any user, then ( ) simply s — with NO actor-vs-target privilege comparison. The only guard ( ) is a last-admin check inside , not the update path. Role assignment / role CRUD are ( ), proving is intended below admin. ## Impact Complete administrator account takeover (C:H/I:H/A:H) by any holder of the delegated permission. ## Proof of Concept 1. Admin delegates a custom "User Manager" role with . 2. with . 3. → admin session. ## Attack Chain 1. Action: admin delegates custom role with . Guard: role creation is . Bypass: intended delegation (holder is meant to manage profiles, not seize admin). 2. Action: . Guard: ( ). Bypass: holder has it; no hierarchy check ( , unconditional Save). 3. Action: as admin → admin session. ## Bypass Evidence - sets for any target; has no actor/target privilege comparison. - Only hits are 's last-admin guard and DTO flags (grep). - is org-level, held by no built-in non-admin role ( ). ## Affected Versions . Reported by **zx (Jace)** — GitHub: @manus-use
Grounded briefings
Catalog interpretations for three audiences. Each brief cites ingested metadata and the original advisories below. They are not independent research and they do not invent exploit steps.
Executive
CVE-2026-96627 is a high public vulnerability record for this product. It is not currently listed in the CISA Known Exploited catalog. Check the linked vendor or CERT advisories for patch status. This summary is a catalog interpretation of the ingested metadata and cites the original advisories below.
System administrator
Identify whether this product is in your estate, then compare installed versions with the affected ranges. Affected packages or ranges on record: github.com/getarcaneapp/arcane/backend/v2 (0 → 2.6.0); github.com/getarcaneapp/arcane/backend/v2 (< 2.6.0). Check the linked vendor or CERT advisories for patch status. Prefer the vendor or distribution advisory linked in Sources before changing production systems. This is a catalog interpretation, not a runbook.
Security analyst
Signals on file: CVSS 8.8. It is not currently listed in the CISA Known Exploited catalog. Weakness classes: CWE-266, CWE-269. Sources contributing to this record: github, go_vulndb, osv. Public exploit references, when present, are outbound links only and are not proof of active exploitation. This is a catalog interpretation of stored metadata.
Exploitation and remediation
Exploitation evidence
Not listed as known exploited in CISA KEV. Not in CISA KEV or VulnCheck KEV.
Patch and remediation
No required-action text is stored yet. Use the vendor or CERT links in Sources for patch availability.
Safe detection guidance
Compare installed versions with the affected ranges below and verify the advisory from the original publisher. This site stores metadata and outbound links only; it does not ship exploit code or proof-of-concept payloads.
Code
The project this record applies to. Exploit listings stay in References.
Timeline
Detection, updates, and resolution for this record.
Oct 16, 2026 · GitHub Advisory Database
Detected
## Summary A user holding the delegated permission can reset the global administrator's password and take over the admin account. sets the target user's from the request body for ANY target with no comparison of caller-vs-target privilege. Because role assignment and role CRUD are deliberately gated by , is intended to sit BELOW admin (profile management); this finding defeats that separation. ##
Oct 16, 2026 · GitHub Advisory Database
Fix available
github.com/getarcaneapp/arcane/backend/v2 fixed in 2.6.0
Oct 16, 2026 · GitHub Advisory Database
Fix available
github.com/getarcaneapp/arcane/backend/v2 fixed in 2.6.0
Oct 16, 2026 · GitHub Advisory Database
Updated
## Summary A user holding the delegated permission can reset the global administrator's password and take over the admin account. sets the target user's from the request body for ANY target with no comparison of caller-vs-target privilege. Because role assignment and role CRUD are deliberately gated by , is intended to sit BELOW admin (profile management); this finding defeats that separation. ##
Affected
- Go github.com/getarcaneapp/arcane/backend/v20 → 2.6.0
- go github.com/getarcaneapp/arcane/backend/v2< 2.6.0
Sources
- GitHub Advisory DatabasePackage advisoryGHSA-pw5q-rjx4-7f7p
GitHub Advisory Database record mirrored by OSV.
github.com - Go Vulnerability DatabasePackage advisoryGHSA-pw5q-rjx4-7f7p
Arcane: Delegated users:update permission allows admin account takeover via password reset (no privilege-hierarchy check)
osv.dev - OpenSSF OSV / OSV ScannerPackage advisoryGHSA-pw5q-rjx4-7f7p
Arcane: Delegated users:update permission allows admin account takeover via password reset (no privilege-hierarchy check)
osv.dev