CVE-2025-33253 NVIDIA NeMo Framework Deserializes Untrusted Data
Attackers can achieve remote code execution and other impacts by tricking users into loading malicious files in NVIDIA NeMo Framework.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-33253?
CVE-2025-33253 is a high-severity unsafe deserialization vulnerability in NVIDIA NeMo Framework, published on 18 Feb 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
NVIDIA NeMo Framework contains a vulnerability where an attacker could cause remote code execution by convincing a user to load a maliciously crafted file. A successful exploit of this vulnerability might lead to code execution, denial of service, information disclosure, and data tampering.
Weakness: CWE-502
Which versions are affected by CVE-2025-33253?
3 open source packages ship an affected version, including nemo-toolkit. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
nemo-toolkit PyPI | All versions | 2.6.1 |
nemo-toolkit PyPI | All versions | 2.6.1 |
nemo-toolkit PyPI | All versions | 2.6.1 |
Products include Nvidia Nemo.
How do I fix CVE-2025-33253?
Upgrade nemo-toolkit to 2.6.1 or later.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2025-33253 being exploited?
There is no known exploitation of CVE-2025-33253 in the wild and no public exploit code.
Other vulnerabilities in NVIDIA NeMo Framework
- CVE-2024-0081 Denial of service in NeMo
- CVE-2025-33245 NVIDIA NeMo Framework contains a vulnerability where malicious data could cause remote code execution
- CVE-2026-24252 Command injection in NeMo Framework
- CVE-2026-24155 Code injection in NeMo Framework
- CVE-2026-24228 Deserialization in NeMo Framework
Sources
Also known as GHSA-hvjw-vp7g-39h5, PYSEC-2026-2673.