CVSS 4.0
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се по мрежата, без особени условия, без вход и без действие от потребителя.
- Експлоатация: няма данни за експлоатация
- Атаката не може да се автоматизира
Описание
Оригинално описание
Improper Encoding or Escaping of Output vulnerability in ash-project ash_authentication_oauth2_server allows an unauthenticated attacker to inject arbitrary authentication parameters into the WWW-Authenticate challenge header. BearerPlug and RequireScopePlug built the Bearer resource_metadata="..." challenge by interpolating a resource_metadata URL derived from the request tenant directly into the quoted value. In a multi-tenant application that sets the Ash tenant from request-controlled data (a subdomain, the Host, a path segment, or a header), a tenant containing a " closes the quoted value and appends attacker-chosen auth-params, including a second resource_metadata URL pointing at an attacker-controlled authorization server that spec-following clients follow. Carriage returns and line feeds are rejected by Plug, so this is parameter injection within one header, not response splitting. This issue affects ash_authentication_oauth2_server: from 0.1.3 before 0.3.1.
Засегнати продукти
- ash-project ash_authentication_oauth2_server: 0.1.3 преди 0.3.1
- ash-project ash_authentication_oauth2_server: 99de0a1cacb5ef667c4533278b7c81ca98c00231 преди 09f97476715da031b136eaec7b2cda2363ad8149
Вид слабост
История
- 7 септември 2026 Публикувано
Други уязвимости в ash-project ash_authentication_oauth2_server
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-82756
- https://nvd.nist.gov/vuln/detail/CVE-2026-82756
- https://github.com/ash-project/ash_authentication_oauth2_server/security/advisories/GHSA-2h3v-83jg-2qmm
- https://cna.erlef.org/cves/CVE-2026-82756.html
- https://osv.dev/vulnerability/EEF-CVE-2026-82756
- https://github.com/ash-project/ash_authentication_oauth2_server/commit/09f97476715da031b136eaec7b2cda2363ad8149