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Vulnerability record · CVE-2017-9462 · published 6 June 2017

CVE-2017-9462: Mercurial incorrect permission assignment vulnerability

Mercurial · Mercurial

In Mercurial before 4.1.3, "hg serve --stdio" allows remote authenticated users to launch the Python debugger, and consequently execute arbitrary code, by using --debugger as a repository name.

8.8 CVSS 3.1 High EPSS 22% · top 2.4% CWE-732 · Incorrect permission assignment
8.8CVSS 3.1 base score, v2 9.0
22%EPSS exploitation probability, 30 days
NoNot in CISA KEV
8Affected product versions listed by NVD
16References
17 Jun 2026Last modified by NVD

Description

In Mercurial before 4.1.3, "hg serve --stdio" allows remote authenticated users to launch the Python debugger, and consequently execute arbitrary code, by using --debugger as a repository name.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

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

References

LinkTags
http://www.debian.org/security/2017/dsa-3963 Third Party Advisory
http://www.securityfocus.com/bid/99123 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2017:1576 Third Party Advisory
https://bugs.debian.org/861243 Issue TrackingMailing ListPatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2018/07/msg00005.html Mailing ListThird Party Advisory
https://security.gentoo.org/glsa/201709-18 Third Party Advisory
https://www.mercurial-scm.org/repo/hg/rev/77eaf9539499 Mailing ListVendor Advisory
https://www.mercurial-scm.org/wiki/WhatsNew#Mercurial_4.1.3_.282017-4-18.29 Release NotesVendor Advisory
http://www.debian.org/security/2017/dsa-3963 Third Party Advisory
http://www.securityfocus.com/bid/99123 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2017:1576 Third Party Advisory
https://bugs.debian.org/861243 Issue TrackingMailing ListPatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2018/07/msg00005.html Mailing ListThird Party Advisory
https://security.gentoo.org/glsa/201709-18 Third Party Advisory
https://www.mercurial-scm.org/repo/hg/rev/77eaf9539499 Mailing ListVendor Advisory
https://www.mercurial-scm.org/wiki/WhatsNew#Mercurial_4.1.3_.282017-4-18.29 Release NotesVendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2017-9462), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.