CVE-2018-1000052: Fmt

High severity, CVSS 7.5. EPSS: 1.4% chance of exploitation in the next 30 days.

fmtlib version prior to version 4.1.0 (before commit 0555cea5fc0bf890afe0071a558e44625a34ba85) contains a Memory corruption (SIGSEGV), CWE-134 vulnerability in fmt::print() library function that can result in Denial of Service. This attack appear to be exploitable via Specifying an invalid format specifier in the fmt::print() function results in a SIGSEGV (memory corruption, invalid write). This vulnerability appears to have been fixed in after commit 8cf30aa2be256eba07bb1cefb998c52326e846e7.

Affected products

• Fmt Fmt: before 4.1.0 (fixed in 4.1.0)

Published 2018-02-09. Last modified 2026-06-17.