lopdf has a stack overflow via deeply nested PDF objects

影響: rust:lopdf < 0.42.0 → 0.42.0

lopdf::Document::load_mem (and the other load entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT. Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting i…

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On 10/17/2026, 04:55 AM, GitHub Advisory Database published "lopdf has a stack overflow via deeply nested PDF objects" (type: Advisory). Severity is "High" (high). Related technologies: Rust.