CVSS 4.0
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се локално, 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
Allocation of Resources Without Limits or Throttling in ueberauth guardian allows denial of service via unbounded atom creation from attacker-controlled binary input. Guardian.Permissions.AtomEncoding encodes permission scopes by passing arbitrary binaries to String.to_atom/1. When encode/3 in lib/guardian/permissions/atom_encoding.ex is called with a list, each binary entry is handled by the encode_value/3 binary clause, which calls String.to_atom(value) with no allow-list check. The perm_set argument (the application's small, finite set of legitimate permission names) is discarded, so any external string flows straight into atom creation. This encoder is selected with use Guardian.Permissions, encoding: Guardian.Permissions.AtomEncoding and reached through the imported encode/3 entry point. String.to_atom/1 creates a brand-new atom for every previously unseen binary, atoms are never garbage collected, and the BEAM atom table is fixed at roughly 1,048,576 entries by default. An application that funnels attacker-influenced permission scopes (from a request body, a JWT claim, or other external input) into encode/3 therefore mints one permanent atom per distinct value. A modest stream of varied, unauthenticated input permanently consumes the atom table and crashes the BEAM node with system_limit, taking down every application running on it. The default encoder is Guardian.Permissions.BitwiseEncoding, which is not affected. This issue affects guardian: from 2.0.0 before 2.4.1.
Засегнати продукти
- ueberauth guardian: 2.0.0 преди 2.4.1
- ueberauth guardian: b7a6128ca4d0ffb7f7df5219dd982304ff9d6802 преди 9cd268557846aa4c3ad53566c08f2c190ee5513f
Вид слабост
История
- 1 август 2026 Публикувано
Други уязвимости в ueberauth guardian
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-55733
- https://nvd.nist.gov/vuln/detail/CVE-2026-55733
- https://github.com/ueberauth/guardian/security/advisories/GHSA-fjr5-7xrc-hmpj
- https://cna.erlef.org/cves/CVE-2026-55733.html
- https://osv.dev/vulnerability/EEF-CVE-2026-55733
- https://github.com/ueberauth/guardian/commit/9cd268557846aa4c3ad53566c08f2c190ee5513f