SpeechBrain before 1.1.1 contains an arbitrary code execution vulnerability that allows attackers to execute arbitrary code by supplying a crafted CKPT.yaml checkpoint metadata file parsed with PyYAMLs unsafe loader during candidate enumeration in Checkpointer.recover_if_possible(). Attackers can embed malicious Python object construction tags such as !!python/object/apply in any CKPT.yaml file within the configured checkpoint path to trigger code execution during candidate discovery, even if the malicious checkpoint is never selected for recovery.
Weakness
The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.
Potential Mitigations
- Make fields transient to protect them from deserialization.
- An attempt to serialize and then deserialize a class containing transient fields will result in NULLs where the transient data should be. This is an excellent way to prevent time, environment-based, or sensitive variables from being carried over and used improperly.
Related Attack Patterns
References
- https://github.com/SaiTeja-Erukude/CVE-2026-10036-speechbrain-rce
- https://github.com/speechbrain/speechbrain/commit/22a616646a493871401461f80b2d5cf564cb2850
- https://github.com/speechbrain/speechbrain/pull/3067
- https://github.com/speechbrain/speechbrain/releases/tag/v1.1.1
- https://www.vulncheck.com/advisories/speechbrain-arbitrary-code-execution-via-ckpt-yaml-parsing