Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

CVE-2026-49839

Gravedad CVSS v3.1:
ALTA
Tipo:
CWE-787 Escritura fuera de límites
Fecha de publicación:
25/06/2026
Última modificación:
26/06/2026

Descripción

*** Pendiente de traducción *** jq is a command-line JSON processor. Prior to 1.8.2,` jq --rawfile` can turn a handled oversized-string error into invalid-state reuse and a real heap out-of-bounds write in assertion-disabled builds. When jv_load_file(raw=1) reads an attacker-controlled file, it repeatedly appends file chunks to the same jv string accumulator. Once jv_string_append_buf() returns jv_invalid_with_msg("String too long"), the raw-file loop does not stop. If the file contains at least one more byte, the next loop iteration appends a new chunk to an object that is already invalid. With assertions enabled this aborts in jvp_string_ptr(). With assertions disabled, the invalid object is interpreted as a string object and ASan reports heap-buffer-overflow. This vulnerability is fixed in 1.8.2.

Productos y versiones vulnerables

CPE Desde Hasta
cpe:2.3:a:jqlang:jq:*:*:*:*:*:*:*:* 1.8.2 (excluyendo)