CVSS 4.0
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се по мрежата, без особени условия, само при определена конфигурация или състояние на системата, без вход и без действие от потребителя.
- Експлоатация: има публичен пример за експлоатация
- Атаката не може да се автоматизира
Описание
Оригинално описание
Permissive Regular Expression vulnerability in ash-project ash_phoenix lets a remote client select the tenant an Ash application uses, or degrade the request, by sending a crafted Host header. AshPhoenix.Helpers.get_subdomain/2 stripped the root domain with String.replace(host, ~r/.?#{root_host}/, ""). The root host was interpolated raw, so each . became a wildcard and any metacharacter a pattern, and the replace was global and unanchored, so a match was removed from anywhere in the string. With root_host example.com, Host: foo.exampleXcom.attacker.net returned the tenant foo.attacker.net. A metacharacter-bearing or nil root host degraded the pattern or raised on every request. The comparison was also case-sensitive, so TENANT.EXAMPLE.COM and EXAMPLE.COM slipped past the root-host allowlist. conn.host comes from the client Host header. The fix matches the root host case-insensitively and only as an exact trailing suffix. This issue affects ash_phoenix: from 2.1.26 before 2.3.25.
Засегнати продукти
- ash-project ash_phoenix: 2.1.26 преди 2.3.25
- ash-project ash_phoenix: 9a5ea4d377bc263de321d79574872a3dfc4fb541 преди 8306f29e77526840c89f3cd244996ce7c0fa2cda
Вид слабост
История
- 31 август 2026 Публикувано
Други уязвимости в ash-project ash_phoenix
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-82726
- https://nvd.nist.gov/vuln/detail/CVE-2026-82726
- https://github.com/ash-project/ash_phoenix/security/advisories/GHSA-rpf8-q9jh-qxrr
- https://cna.erlef.org/cves/CVE-2026-82726.html
- https://osv.dev/vulnerability/EEF-CVE-2026-82726
- https://github.com/ash-project/ash_phoenix/commit/8306f29e77526840c89f3cd244996ce7c0fa2cda