What is CVE-2018-1000021?

CVE-2018-1000021 is a medium-severity vulnerability in Git-Scm Git, classified under Improper Input Validation. CVSS score: 5.0/10. Published 2018-02-09.

How severe is CVE-2018-1000021?

Medium severity. CVSS v3 base score is 5.0 out of 10.

Is CVE-2018-1000021 known to be exploited?

4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Improper input validation in Git-Scm Git

CVE-2018-1000021

GIT version 2.15.1 and earlier contains a Input Validation Error vulnerability in Client that can result in problems including messing up terminal configuration to RCE. This attack appear to be exploitable via The user must interact with a malicious git server, (or have their traffic modified in a MITM attack).

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2018-02-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.0 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.011 (63.6th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 63.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Git-Scm Git

Weakness classification (CWE)

CWE-20 — Improper Input Validation

Public proof-of-concept exploits

References

www.batterystapl.es/2018/01/security-implications-of-ansi-escape.html (Third Party Advisory)

Frequently asked questions

What is CVE-2018-1000021?: CVE-2018-1000021 is a medium-severity vulnerability in Git-Scm Git, classified under Improper Input Validation. CVSS score: 5.0/10. Published 2018-02-09.
How severe is CVE-2018-1000021?: Medium severity. CVSS v3 base score is 5.0 out of 10.
Is CVE-2018-1000021 known to be exploited?: 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.