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Vulnerabilities

Vulnerability · CVE-2018-18928

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

Published Nov 4, 2018 · catalog updated Oct 15, 2026 · international components for unicode

Check if you run it

No confirmed exploitation is on record for CVE-2018-18928. EPSS is 2.90%. Act only if a listed version of international components for unicode is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Critical9.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
2.90%
Remediation
Advisory link
Affected products
Debian:12 icu · Debian:13 icu · Debian:14 icu · cpe icu-project/international components for unicode

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

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • Debian:12 icu0 → 63.1-3
  • Debian:13 icu0 → 63.1-3
  • Debian:14 icu0 → 63.1-3
  • cpe icu-project/international components for unicode63.1

How to fix CVE-2018-18928

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2018-18928. EPSS is 2.90%. Act only if a listed version of international components for unicode is installed.

Which versions are affected?

Compare what you have installed with icu-project/international components for unicode 63.1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-190: Integer Overflow. EPSS 2.90%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Debian security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Nov 4, 2018 · NIST NVD

    Detected

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

  2. Oct 14, 2026 · NIST NVD

    Updated

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

  3. Oct 14, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    icu fixed in 63.1-3; icu fixed in 63.1-3; icu fixed in 63.1-3

  4. Oct 14, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    icu fixed in 63.1-3

  5. Oct 14, 2026 · OpenSSF OSV / OSV Scanner

    Updated

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

  6. Oct 15, 2026 · OpenSSF OSV / OSV Scanner

    Updated

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

Sources

  • CVE.orgVulnerability recordCVE-2018-18928

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2018-18928

    30-day exploitation probability 2.9%

    first.org
  • NIST NVDVulnerability recordCVE-2018-18928

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

    nvd.nist.gov
  • OpenSSF OSV / OSV ScannerPackage advisoryDEBIAN-CVE-2018-18928
    osv.dev

References

Freshness

Last verified in this catalog Oct 16, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.