CVE-2018-20969
CVSS v3
7.8
HIGH
EPSS Score
2.7 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
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.
Technical details
- Published
- 2019-08-16
Frequently asked questions
What is CVE-2018-20969?
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.
Is CVE-2018-20969 actively exploited?
Active exploitation of CVE-2018-20969 has not been confirmed. Its EPSS score was 2.7% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2018-20969?
CVE-2018-20969 has a CVSS v3 base score of 7.8 (HIGH severity).
Is CVE-2018-20969 affecting your environment?
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