Vulnerability · Published Aug 21, 2026 · Assigned by GitHub_M
CVE-2026-53531ratex-parser has unbounded parser recursion that leads to stack overflow (process abort)
Medium 6.9
In plain English
A medium-severity uncontrolled resource consumption in RaTeX from erweixin. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities).
Official description
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 (as reported)
Weakness: CWE-400, CWE-674 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
References
- https://github.com/erweixin/RaTeX/security/advisories/GHSA-4w5h-hx6r-28q7 x_refsource_CONFIRM