GHSA-6v56-cpg6-3rpx · Severity: critical · Ecosystem: pip — Mercurial vulnerable to arbitrary code injection
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.
Conclusion & alert: CVE-2017-17458 is rated High Risk (77.4/100): CVSS Critical severity, with high exploitation likelihood (EPSS 17.25%, 95th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +11.24% over the last day, indicating growing attacker interest. Mandatory action: High exploitation likelihood—assess exposure and prioritize remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-03-04 | 6.01% | 17.25% | +11.24% |
| 2 | 2026-03-01 | 17.25% | 6.01% | -11.24% |
| 3 | 2026-02-04 | — | 17.25% | — |
Full EPSS history (42 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 9.8 | 3.0 | CRITICAL |
|
3.9 | 5.9 | [email protected] |
| 10.0 | 2.0 | HIGH |
|
10.0 | 10.0 | [email protected] |
GHSA-6v56-cpg6-3rpx · Severity: critical · Ecosystem: pip — Mercurial vulnerable to arbitrary code injection
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2017-17458 not yet assigned priority: Debian including 1 source packages (mercurial), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2017-17458 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2017-17458 |
suse
|
medium | CVE-2017-17458 severity moderate: SUSE including 13 source package names (mercurial, mercurial-2.3.2-0.18.6.1, …), 29 product×package rows across 26 product lines (SUSE CaaS Platform 4.0, SUSE Enterprise Storage 6, … (26 product lines)): Fixed 15, Known Not Affected 14. | https://www.suse.com/security/cve/CVE-2017-17458/ |
ubuntu
|
medium | CVE-2017-17458 medium priority: Ubuntu including 1 source packages (mercurial), 7 status rows across 7 suites (artful, bionic, cosmic, trusty, upstream, xenial, zesty): released 3, ignored 2, not-affected 2. | https://ubuntu.com/security/CVE-2017-17458 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| mercurial | mercurial | < 4.4.1 | cpe:2.3:a:mercurial:mercurial:*:*:*:*:*:*:*:* |
| debian | debian_linux | 7.0 | cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* |
| debian | debian_linux | 8.0 | cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* |
| URL | Tags |
|---|---|
| http://www.securityfocus.com/bid/102926 | Third Party Advisory VDB Entry |
| https://bz.mercurial-scm.org/show_bug.cgi?id=5730 | Issue Tracking Third 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 List Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2018/07/msg00005.html | Mailing List Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2018/07/msg00041.html | Mailing List Third 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 |