CVE-2021-41110
CRITICALcwlviewer <1.3.1 - Deserialization of Untrusted Data
Title source: llmDescription
cwlviewer is a web application to view and share Common Workflow Language workflows. Versions prior to 1.3.1 contain a Deserialization of Untrusted Data vulnerability. Commit number f6066f09edb70033a2ce80200e9fa9e70a5c29de (dated 2021-09-30) contains a patch. There are no available workarounds aside from installing the patch. The SnakeYaml constructor, by default, allows any data to be parsed. To fix the issue the object needs to be created with a `SafeConstructor` object, as seen in the patch.
References (3)
Core 3
Core References
Patch, Third Party Advisory x_refsource_confirm
https://github.com/common-workflow-language/cwlviewer/security/advisories/GHSA-7g7j-f5g3-fqp7
Patch, Third Party Advisory x_refsource_misc
https://github.com/common-workflow-language/cwlviewer/commit/f6066f09edb70033a2ce80200e9fa9e70a5c29de
Exploit, Third Party Advisory x_refsource_misc
https://www.fatalerrors.org/a/analysis-of-the-snakeyaml-deserialization-in-java-security.html
Scores
CVSS v3
9.1
EPSS
0.0272
EPSS Percentile
84.2%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Details
CWE
CWE-502
Status
published
Products (1)
commonwl/cwlviewer
< 1.3.1
Published
Oct 01, 2021
Tracked Since
Feb 18, 2026