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CVE-2020-1747

🗓️ 24 Mar 2020 13:56:37Reported by redhatType 
cve
 cve🔗 web.nvd.nist.gov📰️ 7 Media mentions👁 538 Views🌐 WEB

Vulnerability in PyYAML library allows arbitrary code execution via untrusted YAML files

Related
Detection
Affected
Refs
Paths
Social
ReporterTitlePublishedViews
Family
ibm
IBM Security Bulletins		Security Bulletin: IBM Storage Defender - Data Protect critical vulnerabilities resolved in Release Defender 2.2.1/Data Protect 7.4.1
17 Aug 202616:05
–ibm
ibm
IBM Security Bulletins		Security Bulletin: Critical Vulnerabilities in libraries used by libraries that IBM Spectrum discover is using (libraries of libraries)
28 Mar 202216:33
–ibm
ibm
IBM Security Bulletins		Security Bulletin: IBM Cloud Pak for Security includes components with multiple known vulnerabilities
12 Jan 202317:19
–ibm
ibm
IBM Security Bulletins		Security Bulletin: Vulnerability in PyYAML affects IBM Spectrum Protect Plus Container and Microsoft File Systems Agents (CVE-2020-1747)
4 Dec 202006:02
–ibm
ibm
IBM Security Bulletins		Security Bulletin: Multiple Vulnerabilities in IBM Concert Software.
18 Aug 202504:31
–ibm
ibm
IBM Security Bulletins		Security Bulletin: IBM Cognos Analytics has addressed multiple vulnerabilities
9 Oct 202020:01
–ibm
altlinux
ALT Linux		Security fix for the ALT Linux 9 package python-module-yaml version 5.4.1-alt0.p9
22 Mar 202100:00
–altlinux
githubexploit
GithubExploit		Exploit for Deserialization of Untrusted Data in Pyyaml
29 Aug 202510:27
–githubexploit
freebsd
FreeBSD		py-yaml -- FullLoader (still) exploitable for arbitrary command execution
2 Mar 202000:00
–freebsd
attackerkb
ATTACKERKB		CVE-2020-14343
9 Feb 202100:00
–attackerkb
Rows per page
[
  {
    "product": "PyYAML",
    "vendor": "Red Hat",
    "versions": [
      {
        "status": "affected",
        "version": "5.3.1"
      }
    ]
  }
]
SourceLink
listswww.lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WORRFHPQVAFKKXXWLSSW6XKUYLWM6CSH/
bugzillawww.bugzilla.redhat.com/show_bug.cgi
oraclewww.oracle.com/security-alerts/cpujul2022.html
listswww.lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MMQXSZXNJT6ERABJZAAICI3DQSQLCP3D/
githubwww.github.com/yaml/pyyaml/pull/386
listswww.lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZBJA3SGNJKCAYPSHOHWY3KBCWNM5NYK2/
listswww.lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K5HEPD7LEVDPCITY5IMDYWXUMX37VFMY/
listswww.lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7PPAS6C4SZRDQLR7C22A5U3QOLXY33JX/
listswww.lists.opensuse.org/opensuse-security-announce/2020-05/msg00017.html
listswww.lists.opensuse.org/opensuse-security-announce/2020-04/msg00017.html
ParameterPositionPathDescriptionCWE
hostquery parampingCommand injection via ping endpoint (attack vector described in the document)CWE-20
qquery paramsearchReflected XSS vulnerability in the search endpoint (attack vector described in the document)CWE-20
filenamequery paramfilePath traversal vulnerability in file reading endpoint (attack vector described in the document)CWE-20

NEW: CVE-2020-1747 A vulnerability was discovered in the PyYAML library in versions before 5.3.1, where it is susceptible to arbitrary code execution when it processes untrusted YAML files through the full_loa... (click for more) Severity: CRITICAL https://t.co/IkncXRZEQu?amp=1

NEW: CVE-2020-1747 A vulnerability was discovered in the PyYAML library in versions before 5.3.1, where it is susceptible to arbitrary code execution when it processes untrusted YAML files through the full_loa... (click for more) Severity: CRITICAL https://t.co/IkncXRZEQu?amp=1

NEW: CVE-2020-1747 A vulnerability was discovered in the PyYAML library in versions before 5.3.1, where it is susceptible to arbitrary code execution when it processes untrusted YAML files through the full_loa... (click for more) Severity: CRITICAL https://t.co/IkncXRZEQu?amp=1

NEW: CVE-2020-1747 A vulnerability was discovered in the PyYAML library in versions before 5.3.1, where it is susceptible to arbitrary code execution when it processes untrusted YAML files through the full_loa... (click for more) Severity: CRITICAL https://t.co/IkncXShfI2?amp=1

NEW: CVE-2020-1747 A vulnerability was discovered in the PyYAML library in versions before 5.3.1, where it is susceptible to arbitrary code execution when it processes untrusted YAML files through the full_loa... (click for more) Severity: CRITICAL https://t.co/IkncXRZEQu?amp=1

CVE-2020-1747 A vulnerability was discovered in the PyYAML library in versions b... https://t.co/lKs46LT02r?amp=1 Vulnerability Alert Subscriptions: https://t.co/hrQhy5uz4x?amp=1

I know one more IPS that has a protection/signature/rule for the vulnerability CVE-2020-1747. https://t.co/e60xf4iaSc?amp=1 #S7e6bnlcunqjfc

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17 Jun 2026 03:02Current
9.7High risk
Vulners AI Score9.7
CVSS 3.19.8
CVSS 210
EPSS0.05442
CWE-20
pyyamlvulnerabilityarbitrary code executionuntrusted inputnvdcve-2020-1747
538