HighVulnerability

CVE-2026-3071: Flair deserialization flaw in LanguageModel enables code execution

Source: NVD(opens in a new tab)
Identifier: CVE-2026-3071
Published: February 26, 2026
Record updated: October 9, 2026

Known exploitation: Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.
EPSS: 0.2%

Summary

CVE-2026-3071 affects the LanguageModel class of Flair, from version 0.4.1 to the latest release. Deserialization of untrusted data in this class allows arbitrary code execution when a malicious model is loaded. The weakness is classified as CWE-502, and NVD has not yet provided an assessment.

Mitigation

The source does not state a fix yet. Check the original advisory for updates.

Details

Scores and exploitation

CVSS score: 8.4(high)
EPSS: 0.2%Estimated probability that this CVE is exploited in the next 30 days, from the FIRST Exploit Prediction Scoring System. Read on November 4, 2026.

Weaknesses and techniques

Weakness (CWE): CWE-502
Attack pattern (CAPEC): CAPEC-586

Classification

Attack type: Other
Attack sophistication: Moderate
AI component targeted: Model
Impact: Confidentiality,
Integrity,
Availability
Labels: security

How this record was produced

Summaries, mitigations and labels on this page are generated automatically from the source. The linked source is authoritative. The source gives this advisory a description and no title, so the title above is a headline generated from the source text.

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-3071

First tracked: February 26, 2026 at 11:07 AM ET, from NVD/CVE Database

Classifier: claude-haiku-5-5, prompt v4

Classifier confidence: 90% (self-assessed)

Summary

Mitigation

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