{"id":"CVE-2026-53530","title":"RaTeX is a KaTeX-compatible math rendering engine written in Rust","summary":"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 …","severity":"high","cwe":["CWE-248","CWE-400","CWE-1285"],"vendor":"ratex-parser","product":"ratex-parser","affected":["ratex-parser < 0.1.11"],"patched":["ratex-parser 0.1.11"],"published":"2026-08-21","updated":"2026-09-09","sourceUpdated":"2026-09-09T21:06:39.057","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-53530","references":[{"url":"https://github.com/erweixin/RaTeX/security/advisories/GHSA-4hgp-59h5-gvrj","label":"security-advisories@github.com"},{"url":"https://github.com/erweixin/RaTeX/security/advisories/GHSA-4hgp-59h5-gvrj","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://github.com/advisories/GHSA-4hgp-59h5-gvrj"}],"tags":["nvd","ghsa","rust"],"epss":0.00314,"epssPercentile":0.24564,"aliases":["GHSA-4hgp-59h5-gvrj"],"ecosystem":"rust","ingestedAt":"2026-07-07T23:43:59.382Z","slug":"CVE-2026-53530","body":"## Overview\n\nRaTeX 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-53530)\n\nAffected packages:\n\n- `ratex-parser < 0.1.11`\n\nPatched in:\n\n- `ratex-parser 0.1.11`\n\nSource: https://github.com/advisories/GHSA-4hgp-59h5-gvrj","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}