CVE-2026-53530 (GCVE-0-2026-53530)

Vulnerability from cvelistv5 – Published: 2026-08-21 21:31 – Updated: 2026-08-24 20:05
VLAI
Title
ratex-parser panics on `\verb` with a multibyte delimiter (UTF-8 byte-boundary slice)
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 `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.
Severity
8.7 (High)
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
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-24 20:04 UTC
CWE
  • CWE-248 - Uncaught Exception
  • CWE-400 - Uncontrolled Resource Consumption
  • CWE-1285 - Improper Validation of Specified Index, Position, or Offset in Input
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7771 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
erweixin RaTeX Affected: < 0.1.11
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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