CVE WatchOct 12, 2026

CVE-2026-53530

RaTeX is a KaTeX-compatible math rendering engine written in Rust. Prior to version 0.1.11, the public parser entrypoint `ratex_parser::pars

CVSS

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No CVSS

EPSS

0.4%

p36

KEV

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Exploit Today

0-100

Published: Aug 21, 2026 · Last modified: Oct 12, 2026 · CWE-248 · CWE-400 · CWE-1285

EPSS · 30d

0.3%EPSS · 30 days0.4%

2026-09-222026-10-20

Technical description

RaTeX is a KaTeX-compatible math rendering engine written in Rust. Prior to version 0.1.11, the public parser entrypoint `ratex_parser::parse(&str)` panics on the 9-byte input `\verbéxé` (i.e. `\verb` followed by the non-ASCII delimiter `é`). When handling a `\verb` command, the parser slices the verbatim argument with byte indices (`arg[1..arg.len() - 1]`); if the delimiter character is multibyte UTF-8, index `1` lands inside that character and Rust panics with *“byte index 1 is not a char boundary”*. Because RaTeX’s release profile sets `panic = "abort"` (`Cargo.toml:48`), the panic aborts the entire process — not just the current request/thread — making this a hard denial of service for any service that renders untrusted LaTeX. Version 0.1.11 fixes the issue.

Official references

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