What is CVE-2017-17831?

CVE-2017-17831 is a high-severity vulnerability in Git Large File Storage Project, classified under Improper Input Validation. CVSS score: 8.8/10. Published 2017-12-21.

How severe is CVE-2017-17831?

High severity. CVSS v3 base score is 8.8 out of 10.

Improper input validation in Git Large File Storage Project

CVE-2017-17831

GitHub Git LFS before 2.1.1 allows remote attackers to execute arbitrary commands via an ssh URL with an initial dash character in the hostname, located on a "url =" line in a .lfsconfig file within a repository.

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

Published 2017-12-21 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.037 (89.3th percentile), scored 2026-10-07.

Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 89.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.037 · newest: 0.037 · change: 0.000

Affected products

Git Large File Storage Project

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

github.com/git-lfs/git-lfs/releases/tag/v2.1.1 (Third Party Advisory, Release Notes)
blog.recurity-labs.com/2017-08-10/scm-vulns (Exploit, Third Party Advisory)
www.securityfocus.com/bid/102926 (VDB Entry, Third Party Advisory, vdb-entry)
github.com/git-lfs/git-lfs/pull/2242 (Patch, Third Party Advisory)
confluence.atlassian.com/sourcetreekb/sourcetree-security-advisory-2018-01-24-9… (Third Party Advisory)

Frequently asked questions

What is CVE-2017-17831?: CVE-2017-17831 is a high-severity vulnerability in Git Large File Storage Project, classified under Improper Input Validation. CVSS score: 8.8/10. Published 2017-12-21.
How severe is CVE-2017-17831?: High severity. CVSS v3 base score is 8.8 out of 10.