CVE-2026-26311

{"id": "CVE-2026-26311", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.9, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 2.2}]}, "published": "2026-03-10T20:16:36.183", "references": [{"url": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-84xm-r438-86px", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-416"}]}], "descriptions": [{"lang": "en", "value": "Envoy is a high-performance edge/middle/service proxy. Prior to 1.37.1, 1.36.5, 1.35.8, and 1.34.13, a logic vulnerability in Envoy's HTTP connection manager (FilterManager) that allows for Zombie Stream Filter Execution. This issue creates a \"Use-After-Free\" (UAF) or state-corruption window where filter callbacks are invoked on an HTTP stream that has already been logically reset and cleaned up. The vulnerability resides in source/common/http/filter_manager.cc within the FilterManager::decodeData method. The ActiveStream object remains valid in memory during the deferred deletion window. If a DATA frame arrives on this stream immediately after the reset (e.g., in the same packet processing cycle), the HTTP/2 codec invokes ActiveStream::decodeData, which cascades to FilterManager::decodeData. FilterManager::decodeData fails to check the saw_downstream_reset_ flag. It iterates over the decoder_filters_ list and invokes decodeData() on filters that have already received onDestroy(). This vulnerability is fixed in 1.37.1, 1.36.5, 1.35.8, and 1.34.13."}, {"lang": "es", "value": "Envoy es un proxy de borde/intermedio/servicio de alto rendimiento. Antes de 1.37.1, 1.36.5, 1.35.8 y 1.34.13, una vulnerabilidad l\u00f3gica en el gestor de conexiones HTTP de Envoy (FilterManager) permite la Ejecuci\u00f3n de Filtro de Flujo Zombie. Este problema crea una ventana de 'Uso despu\u00e9s de liberaci\u00f3n' (UAF) o de corrupci\u00f3n de estado donde las devoluciones de llamada de filtro se invocan en un flujo HTTP que ya ha sido l\u00f3gicamente restablecido y limpiado. La vulnerabilidad reside en source/common/http/filter_manager.cc dentro del m\u00e9todo FilterManager::decodeData. El objeto ActiveStream permanece v\u00e1lido en memoria durante la ventana de eliminaci\u00f3n diferida. Si un frame DATA llega en este flujo inmediatamente despu\u00e9s del restablecimiento (por ejemplo, en el mismo ciclo de procesamiento de paquetes), el c\u00f3dec HTTP/2 invoca ActiveStream::decodeData, lo que se propaga a FilterManager::decodeData. FilterManager::decodeData no verifica el flag saw_downstream_reset_. Itera sobre la lista decoder_filters_ e invoca decodeData() en filtros que ya han recibido onDestroy(). Esta vulnerabilidad se corrige en 1.37.1, 1.36.5, 1.35.8 y 1.34.13."}], "lastModified": "2026-03-11T16:03:58.183", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C4169052-E37B-4577-8689-4DA8D6AFF3F3", "versionEndExcluding": "1.34.13"}, {"criteria": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "35DB0A9F-BCEA-48D7-97DE-A63FA24B2032", "versionEndExcluding": "1.35.8", "versionStartIncluding": "1.35.0"}, {"criteria": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B37DDD3B-8F92-4F76-B3B1-F3743CB41339", "versionEndExcluding": "1.36.5", "versionStartIncluding": "1.36.0"}, {"criteria": "cpe:2.3:a:envoyproxy:envoy:1.37.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C5266F62-E0D2-4525-90B6-65921EE14F79"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}