{"id":"CVE-2026-12481","summary":"Deserialization of Untrusted Data in keras-team/keras","details":"A vulnerability in keras-team/keras version 3.14.0 allows for arbitrary code execution due to improper handling of deserialization in the `Lambda` layer. Specifically, the `_raise_for_lambda_deserialization()` function fails to enforce the safe-mode guard when `safe_mode` is set to `None`, which is the default value when `from_config()` is called outside of a `SafeModeScope` context. This logic error conflates `None` (unset/default-deny) with `False` (explicitly disabled), bypassing the guard and allowing attacker-controlled `marshal` bytecode to be deserialized. Affected call sites include `keras.layers.deserialize(config)`, `keras.models.clone_model(model)`, and any direct invocation of `Lambda.from_config(config)` without an enclosing `SafeModeScope(True)`. This vulnerability can be exploited to achieve arbitrary OS-level code execution in the context of the server or user process.","aliases":["GHSA-5gwj-m78q-7pq3","PYSEC-2026-3631"],"modified":"2026-08-12T03:51:25.298156029Z","published":"2026-07-03T20:36:05.003Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/12xxx/CVE-2026-12481.json","cna_assigner":"@huntr_ai","cwe_ids":["CWE-502"]},"references":[{"type":"WEB","url":"https://huntr.com/bounties/59ceaed1-c8a3-4135-8f94-169ade02823d"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/12xxx/CVE-2026-12481.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-12481"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/keras-team/keras","events":[{"introduced":"050671c8cfa58cd288bcc1f4ad21e83991bfdf9f"},{"last_affected":"050671c8cfa58cd288bcc1f4ad21e83991bfdf9f"}],"database_specific":{"source":"CPE_STRING","cpe":"cpe:2.3:a:keras:keras:3.14.0:*:*:*:*:*:*:*","extracted_events":[{"introduced":"3.14.0"},{"last_affected":"3.14.0"}]}}],"versions":["3.14.0","v3.14.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-12481.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"}]}