Stanza: RCE via pickle deserialization in the lemmatizer
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| stanfordnlp | stanza | affected |
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| Stanfordnlp | Stanza |
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| Source | ID | Title |
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Github GHSA |
GHSA-gh9r-c94j-cmp5 | Stanza: RCE via pickle deserialization in the lemmatizer |
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.597% probability within 30 days)
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ssvc
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| First Time appeared |
Stanfordnlp
Stanfordnlp stanza |
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| Vendors & Products |
Stanfordnlp
Stanfordnlp stanza |
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| Description | Stanza is a Stanford NLP Python library for tokenization, sentence segmentation, NER, and parsing of many human languages. From 1.14.0 until 1.15.0, loading an attacker-supplied lemmatizer checkpoint can execute arbitrary code because stanza/models/lemma/trainer.py stores pos_dict as gzip-compressed pickle bytes and Trainer.load passes the decompressed stream to unrestricted pickle.loads. The outer torch.load call uses weights_only=True, but the nested bytes are treated as a primitive and are not inspected by that allowlist. The path is reachable during pipeline construction through a caller-influenced lemma_model_path, before inference begins. This issue is fixed in version 1.15.0. | |
| Title | Stanza: RCE via pickle deserialization in the lemmatizer | |
| Weaknesses | CWE-502 CWE-94 |
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| References |
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| Metrics |
cvssV3_1
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