CVE-2018-13348: Mercurial

High severity, CVSS 7.5. EPSS: 2.1% chance of exploitation in the next 30 days.

The mpatch_decode function in mpatch.c in Mercurial before 4.6.1 mishandles certain situations where there should be at least 12 bytes remaining after the current position in the patch data, but actually are not, aka OVE-20180430-0001.

Affected products

• Mercurial Mercurial: before 4.6.1 (fixed in 4.6.1)

Published 2018-07-06. Last modified 2026-06-17.