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Vulnerability details: VCID-px6s-pf9p-yfem
Vulnerability ID VCID-px6s-pf9p-yfem
Aliases CVE-2020-5238
Summary The table extension in GitHub Flavored Markdown before version 0.29.0.gfm.1 takes O(n * n) time to parse certain inputs. An attacker could craft a markdown table which would take an unreasonably long time to process, causing a denial of service. This issue does not affect the upstream cmark project. The issue has been fixed in version 0.29.0.gfm.1.
Status Published
Exploitability 0.5
Weighted Severity 5.9
Risk 3.0
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-20 Improper Input Validation
System Score Found at
cvssv3 6.5 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-5238.json
epss 0.00509 https://api.first.org/data/v1/epss?cve=CVE-2020-5238
epss 0.00509 https://api.first.org/data/v1/epss?cve=CVE-2020-5238
epss 0.00509 https://api.first.org/data/v1/epss?cve=CVE-2020-5238
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-5238.json
https://api.first.org/data/v1/epss?cve=CVE-2020-5238
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-5238
1854328 https://bugzilla.redhat.com/show_bug.cgi?id=1854328
965980 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=965980
965981 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=965981
965982 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=965982
965983 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=965983
965984 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=965984
RHSA-2021:1972 https://access.redhat.com/errata/RHSA-2021:1972
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-5238.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 0.66785
EPSS Score 0.00509
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-11T20:28:08.195420+00:00 Debian Oval Importer Import https://www.debian.org/security/oval/oval-definitions-bullseye.xml.bz2 38.6.0