What is CVE-2026-31239?

CVE-2026-31239 is a critical-severity vulnerability in N/a, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2026-05-12.

How severe is CVE-2026-31239?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Deserialization in N/a

CVE-2026-31239

The mamba language model framework thru 2.2.6 is vulnerable to insecure deserialization (CWE-502) when loading pre-trained models from HuggingFace Hub. The MambaLMHeadModel.from_pretrained() method uses torch.load() to load the pytorch_mod…

Vulnerability class: Insecure Deserialization

EPSS: 0.001 (17.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

N/a — versions n/a

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

cve@mitre.org
cve@mitre.org

Frequently asked questions

What is CVE-2026-31239?: CVE-2026-31239 is a critical-severity vulnerability in N/a, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2026-05-12.
How severe is CVE-2026-31239?: Critical severity. CVSS v3 base score is 9.8 out of 10.