{"id":"CVE-2026-53530","summary":"ratex-parser panics on `\\verb` with a multibyte delimiter (UTF-8 byte-boundary slice)","details":"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.","aliases":["GHSA-4hgp-59h5-gvrj"],"modified":"2026-09-11T03:30:50.016331786Z","published":"2026-08-21T21:31:12.665Z","database_specific":{"cwe_ids":["CWE-1285","CWE-248","CWE-400"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53530.json","cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53530.json"},{"type":"ADVISORY","url":"https://github.com/erweixin/RaTeX/security/advisories/GHSA-4hgp-59h5-gvrj"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53530"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/erweixin/ratex","events":[{"introduced":"0"},{"fixed":"f45ce1b7155390257ced1a5f6931ace65c4a3074"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"0.1.11"}],"source":"AFFECTED_FIELD"}}],"versions":["ratex-types-v0.0.3","ratex-parser-v0.0.3","ratex-lexer-v0.0.3","ratex-layout-v0.0.3","ratex-font-v0.0.3"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53530.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}]}