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Vulnerability record · CVE-2017-17458 · published 7 December 2017

CVE-2017-17458: Mercurial os command injection vulnerability

Mercurial · Mercurial

In Mercurial before 4.4.1, it is possible that a specially malformed repository can cause Git subrepositories to run arbitrary code in the form of a .git/hooks/post-update script checked into the repository. Typical use of Mercurial prevents construction of such repositories, but they can be created programmatically.

9.8 CVSS 3.0 Critical EPSS 6.3% · top 6.6% CWE-78 · OS command injection
9.8CVSS 3.0 base score, v2 10.0
6.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
18References
17 Jun 2026Last modified by NVD

Description

In Mercurial before 4.4.1, it is possible that a specially malformed repository can cause Git subrepositories to run arbitrary code in the form of a .git/hooks/post-update script checked into the repository. Typical use of Mercurial prevents construction of such repositories, but they can be created programmatically.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securityfocus.com/bid/102926 Third Party AdvisoryVDB Entry
https://bz.mercurial-scm.org/show_bug.cgi?id=5730 Issue TrackingThird Party Advisory
https://confluence.atlassian.com/sourcetreekb/sourcetree-security-advisory-2018-01-24-942834324.html Third Party Advisory
https://lists.debian.org/debian-lts-announce/2017/12/msg00027.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2018/07/msg00005.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2018/07/msg00041.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/07/msg00032.html
https://www.mercurial-scm.org/pipermail/mercurial-devel/2017-November/107333.html Vendor Advisory
https://www.mercurial-scm.org/wiki/WhatsNew#Mercurial_4.4.1_.282017-11-07.29 Vendor Advisory
http://www.securityfocus.com/bid/102926 Third Party AdvisoryVDB Entry
https://bz.mercurial-scm.org/show_bug.cgi?id=5730 Issue TrackingThird Party Advisory
https://confluence.atlassian.com/sourcetreekb/sourcetree-security-advisory-2018-01-24-942834324.html Third Party Advisory
https://lists.debian.org/debian-lts-announce/2017/12/msg00027.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2018/07/msg00005.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2018/07/msg00041.html Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/07/msg00032.html
https://www.mercurial-scm.org/pipermail/mercurial-devel/2017-November/107333.html Vendor Advisory
https://www.mercurial-scm.org/wiki/WhatsNew#Mercurial_4.4.1_.282017-11-07.29 Vendor Advisory

Track CVE-2017-17458 inside VULONE

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Source: NIST National Vulnerability Database (record CVE-2017-17458), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.