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Vulnerabilities

Vulnerability · CVE-2026-1839

A vulnerability in the HuggingFace Transformers library, specifically in the class, allows for arbitrary code execution.

Published Apr 7, 2026 · catalog updated Jun 17, 2026 · A vulnerability in the

Check if you run it

No confirmed exploitation is on record for CVE-2026-1839. EPSS is 0.38%. Act only if a listed version of A vulnerability in the is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (A vulnerability in the).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.38%
Remediation
Advisory link
Affected products
cpe huggingface/transformers

A vulnerability in the HuggingFace Transformers library, specifically in the class, allows for arbitrary code execution. The method in at line 3059 calls without the parameter. This issue affects all versions of the library supporting when used with PyTorch versions below 2.6, as the context manager provides no protection in these versions. An attacker can exploit this vulnerability by supplying a malicious checkpoint file, such as , which can execute arbitrary code when loaded. The issue is resolved in version v5.0.0rc3.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe huggingface/transformers5.0.0

How to fix CVE-2026-1839

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-1839. EPSS is 0.38%. Act only if a listed version of A vulnerability in the is installed.

Which versions are affected?

Compare what you have installed with 5.0.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-502: Deserialization of Untrusted Data. EPSS 0.38%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 7, 2026 · NIST NVD

    Detected

    A vulnerability in the HuggingFace Transformers library, specifically in the class, allows for arbitrary code execution. The method in at line 3059 calls without the parameter. This issue affects all versions of the library supporting when used with PyTorch versions below 2.6, as the context manager provides no protection in these versions. An attacker can exploit this vulnerability by supplying a

  2. Jun 17, 2026 · NIST NVD

    Updated

    A vulnerability in the HuggingFace Transformers library, specifically in the class, allows for arbitrary code execution. The method in at line 3059 calls without the parameter. This issue affects all versions of the library supporting when used with PyTorch versions below 2.6, as the context manager provides no protection in these versions. An attacker can exploit this vulnerability by supplying a

Sources

  • CVE.orgVulnerability recordCVE-2026-1839

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-1839

    30-day exploitation probability 0.4%

    first.org
  • NIST NVDVulnerability recordCVE-2026-1839

    A vulnerability in the HuggingFace Transformers library, specifically in the class, allows for arbitrary code execution. The method in at line 3059 calls without the parameter. This iss

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.