CVE-2026-53531: Erweixin Ratex

Medium severity, CVSS 6.9. EPSS: 0.4% chance of exploitation in the next 30 days.

RaTeX is a KaTeX-compatible math rendering engine written in Rust. Prior to version 0.1.11, RaTeX’s recursive-descent parser recurses one (or more) native stack frame per nesting level at `{`, `\left`, `\sqrt{`, `^{`, etc, with no maximum depth limit. A short, ~10 KB input of nested groups overflows the 8 MB main-thread stack and aborts the process. With `panic = "abort"` (`Cargo.toml:48`), and because a Rust stack overflow is always a fatal `SIGABRT` regardless of panic strategy this is an unrecoverable, whole-process denial of service reachable from a single untrusted LaTeX string. Version 0.1.11 fixes the issue.

Affected products

• Erweixin Ratex: before 0.1.11 (fixed in 0.1.11)

Published 2026-08-21. Last modified 2026-09-09.