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TI-2018-09591 Aliases CVE-2018-13346GHSA-9xv4-r2hf-26gh

The mpatch_apply function in mpatch.c in Mercurial before 4.6.1 incorrectly proceeds in…

Priority LOW 37CWE-20Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · High · None
Fix status
Partial Red Hat: 6 fixed, 1 without a fix

Attack profile from CVSS 3.0 · NVD. Fix status from CNA, GitHub and Red Hat.

Summary

The mpatch_apply function in mpatch.c in Mercurial before 4.6.1 incorrectly proceeds in cases where the fragment start is past the end of the original data, aka OVE-20180430-0004.

Why it matters now

EPSS 0.02402 84th percentileScored 2026-11-07
Fix Partial mercurial (PyPI): 4.6.1Red Hat: 1 advisoryRed Hat: 6 fixed, 1 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
—mercurial (PyPI)before 4.6.14.6.1Patch availableGHSA-9xv4-r2hf-26gh
  • — Vendor— Affected all versions Fixed in — No fix listed CNA
  • mercurial (PyPI) Vendor— Affected before 4.6.1 Fixed in 4.6.1 Patch available GHSA-9xv4-r2hf-26gh

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:mercurial:mercurial:*:*:*:*:*:*:*:*before 4.6.1VulnerableMercurial
  • cpe:2.3:a:mercurial:mercurial:*:*:*:*:*:*:*:* Versions before 4.6.1 Vulnerable ·Mercurial

Remediation

  • Fix · GHSA-9xv4-r2hf-26gh mercurial (PyPI) Fixed in 4.6.1 Advisory →

Red Hat 1 advisory

  • RHSA-2019:2276 Released 2019-08-06 · Red Hat rating Moderate
    mercurial security update
    • Red Hat Enterprise Linux Client Optional (v. 7) emacs-mercurial-2.6.2-10.el7, emacs-mercurial-el-2.6.2-10.el7, mercurial-2.6.2-10.el7 +1
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) emacs-mercurial-2.6.2-10.el7, emacs-mercurial-el-2.6.2-10.el7, mercurial-2.6.2-10.el7 +1
    • Red Hat Enterprise Linux Server (v. 7) mercurial-2.6.2-10.el7
    • Red Hat Enterprise Linux Server Optional (v. 7) emacs-mercurial-2.6.2-10.el7, emacs-mercurial-el-2.6.2-10.el7, mercurial-hgk-2.6.2-10.el7
    • Red Hat Enterprise Linux Workstation (v. 7) mercurial-2.6.2-10.el7
    • Red Hat Enterprise Linux Workstation Optional (v. 7) emacs-mercurial-2.6.2-10.el7, emacs-mercurial-el-2.6.2-10.el7, mercurial-hgk-2.6.2-10.el7

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2019:2276
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2019:2276
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2019:2276
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2019:2276
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2019:2276
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2019:2276
Not affected: 1 product
  • Red Hat Enterprise Linux 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-13346
  2. 2026-10-03 Alias added: GHSA-9xv4-r2hf-26gh

References

Patch 1

Advisory 3

Other 2

  • TI-2014-07619 Git before 1.8.5.6, 1.9.x before 1.9.5, 2.0.x before 2.0.5, 2.1.x before 2.1.4, and 2.2.x… CVSS 3.1CRITICAL 9.8
  • TI-2017-06870 In Mercurial before 4.1.3, "hg serve --stdio" allows remote authenticated users to launch… CVSS 3.1HIGH 8.8
  • TI-2017-14453 Mercurial prior to 4.3 did not adequately sanitize hostnames passed to ssh, leading to possible shell-injection attacks. CVSS 3.0CRITICAL 9.8
  • TI-2017-12752 In Mercurial before 4.4.1, it is possible that a specially malformed repository can cause… CVSS 3.0CRITICAL 9.8
  • TI-2018-09592 mpatch.c in Mercurial before 4.6.1 mishandles integer addition and subtraction, aka OVE-20180430-0002. CVSS 3.0CRITICAL 9.8
  • TI-2016-03079 The binary delta decoder in Mercurial before 3.7.3 allows remote attackers to execute… CVSS 3.1HIGH 8.8
See all 18 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences