CVE-2018-17983: Mercurial

Critical severity, CVSS 9.1. EPSS: 2% chance of exploitation in the next 30 days.

cext/manifest.c in Mercurial before 4.7.2 has an out-of-bounds read during parsing of a malformed manifest entry.

Affected products

• Mercurial Mercurial: before 4.7.2 (fixed in 4.7.2)

Published 2018-10-04. Last modified 2026-06-17.