EEF-CVE-2026-75757
- Source
- https://cna.erlef.org/osv/EEF-CVE-2026-75757.html
- Import Source
- https://cna.erlef.org/osv/EEF-CVE-2026-75757.json
- JSON Data
- https://api.osv.dev/v1/vulns/EEF-CVE-2026-75757
- Aliases
-
- CVE-2026-75757
- GHSA-3259-55fp-w94j
- Published
- 2026-08-31T02:20:17Z
- Modified
- 2026-09-08T03:30:11Z
- Severity
-
- 8.3 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N CVSS Calculator
- Summary
- AshAdmin cookie reader matches names by substring, enabling actor/session shadowing from a sibling subdomain
- Details
-
Summary
Reliance on Cookies without Validation and Integrity Checking vulnerability in ash-project ash_admin lets an attacker who controls a sibling subdomain rebind an admin's session to a different actor, tenant, or authorization mode.
AshAdmin's client JavaScript read its state cookies (
tenant,actor_resource,actor_primary_key,actor_action,actor_domain,actor_authorizing,actor_paused) by matching the cookie name with an unanchored regular expression (new RegExp(name + "=([^;]+)")) against the wholedocument.cookie. Any cookie whose name merely ends with the requested name therefore matches, and whichever is serialized first wins. Because cookies are shared across a registrable domain, a compromised sibling subdomain can set a shadowing cookie (for examplexactor_authorizing) withDomain=.example.comthat flows unvalidated into the admin's LiveSocket connect params. The fix matches cookie names by exact equality.This issue affects ash_admin: from 0.9.1 before 1.3.1.
- Database specific
{ "capec_ids": [ "CAPEC-31" ], "cpe_ids": [ "cpe:2.3:a:ash-project:ash_admin:*:*:*:*:*:*:*:*" ], "cwe_ids": [ "CWE-565" ] }- References
- Credits
-
-
- Peter Ullrich - FINDER
-
- Peter Ullrich - REPORTER
-
- Zach Daniel / Ash Project - REMEDIATION_DEVELOPER
-
- Jonatan Männchen / EEF - COORDINATOR
-
Affected packages
Hex / ash_admin
Package
- Name
- ash_admin
- Purl
- pkg:hex/ash_admin