VDB
PYSEC-2020-96
PYSEC-2020-96
PUBLISHED
CVSS 9.300000190734863 CRITICAL
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_load method or with the FullLoader loader. Applications that use the library to process untrusted input may be vulnerable to this flaw. An attacker could use this flaw to execute arbitrary code on the system by abusing the python/object/new constructor.
Risk Scores
CVSS v4.0
9.300000190734863
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| PyPI | pyyaml | 5.1, 5.1, 5.1.1 |
Timeline
- Mar 24, 2020 CVE Published
- May 4, 2026 CVE Updated
References
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1747 report
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WORRFHPQVAFKKXXWLSSW6XKUYLWM6CSH/ url
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZBJA3SGNJKCAYPSHOHWY3KBCWNM5NYK2/ url
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/K5HEPD7LEVDPCITY5IMDYWXUMX37VFMY/ url
- http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00017.html url
- http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00017.html url
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MMQXSZXNJT6ERABJZAAICI3DQSQLCP3D/ url
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7PPAS6C4SZRDQLR7C22A5U3QOLXY33JX/ url
- https://github.com/advisories/GHSA-6757-jp84-gxfx advisory
- https://github.com/yaml/pyyaml/pull/386 fix