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: има публичен пример за експлоатация
- Атаката може да се автоматизира
Описание
Оригинално описание
Inefficient algorithmic complexity in Plug's nested-parameter decoder allows an unauthenticated remote attacker to cause denial of service. Plug.Conn.Query.decode/4 (and Plug.Conn.Query.decode_each/2) parse query strings and application/x-www-form-urlencoded request bodies. When a key contains many bracketed segments such as a[a][a][a]=1, the decoder walks the brackets and, for each of the N levels, performs a map operation keyed on an ever-growing binary prefix of the key, hashing the full byte range at each step. The total decode cost is therefore quadratic in the number of nesting levels. With the default Plug.Parsers.URLENCODED body limit of 1,000,000 bytes, a single request can carry roughly 333,000 nesting levels and saturate a BEAM scheduler for minutes. A small number of concurrent requests can saturate all schedulers and render a Plug-based server unresponsive. No authentication or knowledge of application routes is required. This vulnerability is associated with program files lib/plug/conn/query.ex and program routines Plug.Conn.Query.decode/4, Plug.Conn.Query.decode_each/2, Plug.Conn.Query.split_keys/6, Plug.Conn.Query.insert_keys/3, and Plug.Conn.Query.finalize_pointer/2. This issue affects plug from 1.15.0 before 1.15.5, 1.16.4, 1.17.2, 1.18.3, and 1.19.3.
Засегнати продукти
- elixir-plug plug: 1.15.0 преди 1.15.5; 1.16.0 преди 1.16.4; 1.17.0 преди 1.17.2; 1.18.0 преди 1.18.3; 1.19.0 преди 1.19.3
- elixir-plug plug: 712b875d3442c765d8d37e546ffd5ad9f8afcc55 преди *
Вид слабост
История
- 23 юни 2026 Публикувано
Други уязвимости в elixir-plug plug
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-54892
- https://nvd.nist.gov/vuln/detail/CVE-2026-54892
- https://github.com/elixir-plug/plug/security/advisories/GHSA-j43x-5hjq-rgxf
- https://cna.erlef.org/cves/CVE-2026-54892.html
- https://osv.dev/vulnerability/EEF-CVE-2026-54892
- https://github.com/elixir-plug/plug/commit/c317d08fdcf96e17931f7419275b2b8c4bf3e951
- https://github.com/elixir-plug/plug/commit/9c5d37c440eaae92869eed7c014c47266744fadb
- https://github.com/elixir-plug/plug/commit/d737eb236f17e31a36290e39f9ef3cd86a1343bd
- https://github.com/elixir-plug/plug/commit/d4e5568392a4b29e545b91e12e87d6098f976145
- https://github.com/elixir-plug/plug/commit/a61124aa625d819a218fb07f90afbac8aa85eb0e