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Vulnerability details: VCID-ycqe-xdf8-x3du
Vulnerability ID VCID-ycqe-xdf8-x3du
Aliases CVE-2018-20969
Summary do_ed_script in pch.c in GNU patch through 2.7.6 does not block strings beginning with a ! character. NOTE: this is the same commit as for CVE-2019-13638, but the ! syntax is specific to ed, and is unrelated to a shell metacharacter.
Status Published
Exploitability 0.5
Weighted Severity 7.0
Risk 3.5
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
System Score Found at
cvssv3 7.8 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-20969.json
epss 0.00364 https://api.first.org/data/v1/epss?cve=CVE-2018-20969
epss 0.00364 https://api.first.org/data/v1/epss?cve=CVE-2018-20969
epss 0.00364 https://api.first.org/data/v1/epss?cve=CVE-2018-20969
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-20969.json
https://api.first.org/data/v1/epss?cve=CVE-2018-20969
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20969
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-13636
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-13638
1746672 https://bugzilla.redhat.com/show_bug.cgi?id=1746672
RHSA-2019:2798 https://access.redhat.com/errata/RHSA-2019:2798
RHSA-2019:2964 https://access.redhat.com/errata/RHSA-2019:2964
RHSA-2019:3757 https://access.redhat.com/errata/RHSA-2019:3757
RHSA-2019:3758 https://access.redhat.com/errata/RHSA-2019:3758
RHSA-2019:4061 https://access.redhat.com/errata/RHSA-2019:4061
No exploits are available.
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-20969.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.58773
EPSS Score 0.00364
Published At June 4, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-04T17:06:36.780089+00:00 Debian Importer Import https://security-tracker.debian.org/tracker/data/json 38.6.0