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 vulnerability in ueberauth guardian (Guardian.Permissions module) allows a denial of service via BEAM atom-table exhaustion. This vulnerability is associated with program file lib/guardian/permissions.ex and program routines 'Elixir.Guardian.Permissions':encode_permissions!/1, 'Elixir.Guardian.Permissions':encode_permissions_into_claims!/2, 'Elixir.Guardian.Permissions':do_encode_permissions!/2. The Guardian.Permissions mixin installs a public encode_permissions!/1 function on every module that does use Guardian.Permissions. For each key of the supplied map, encode_permissions!/1 calls String.to_atom(to_string(k)) before any validation runs. The integer-value clause of do_encode_permissions!/2 then short-circuits straight to encoding without validating the key against the configured permission set, so a key with an integer value is interned as a fresh atom with no exception raised. Atoms are never garbage collected and the BEAM atom table is a fixed-size resource (default roughly 1,048,576 entries), so each unique attacker-chosen key permanently consumes one slot. An attacker who can influence a permission map that reaches encode_permissions!/1 (for example a permissions map read from a request body and passed into token issuance via encode_permissions_into_claims!/2) can mint an unbounded number of atoms and exhaust the atom table, crashing the entire BEAM node and every service running on it. The sibling decode_permissions/1 is not affected because it skips keys absent from the configured permission set. 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 8d4efbfc352d30f5fcfc75a4d69a795b0e472724
Вид слабост
История
- 1 август 2026 Публикувано
Други уязвимости в ueberauth guardian
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-55734
- https://nvd.nist.gov/vuln/detail/CVE-2026-55734
- https://github.com/ueberauth/guardian/security/advisories/GHSA-9qx2-v587-q3gg
- https://cna.erlef.org/cves/CVE-2026-55734.html
- https://osv.dev/vulnerability/EEF-CVE-2026-55734
- https://github.com/ueberauth/guardian/commit/8d4efbfc352d30f5fcfc75a4d69a795b0e472724