PYSEC-2023-236

Remarshal prior to v0.17.1 expands YAML alias nodes unlimitedly, hence Remarshal is vulnerable to Billion Laughs Attack. Processing untrusted YAML files may cause a denial-of-service DoS condition...

Remarshal unlimitedly expanding YAML alias nodes

Overview Remarshal provided by Remarshal Project expands YAML alias nodes unlimitedly CWE-674, hence Remarshal is vulnerable to Billion Laughs Attack. Taichi Kotake of Sterra Security Co.,Ltd. / Akatsuki Games Inc. reported this vulnerability to IPA. JPCERT/CC coordinated with the developer under...