HighVulnerability

CVE-2026-8470: IBM Langflow OSS weak Fernet key generation from user secrets

Source: NVD(opens in a new tab)
Identifier: CVE-2026-8470
Published: August 5, 2026
Record updated: October 9, 2026

Known exploitation: Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.
EPSS: 0.1%

Summary

CVE-2026-8470 affects IBM Langflow OSS versions 1.0.0 through 1.10.3. The product uses Python's non-cryptographic random module to generate Fernet encryption keys from user secrets shorter than 32 characters. Because the Mersenne Twister generator is deterministic, identical seeds produce identical keys, so an attacker can reproduce the keys and decrypt stored API keys and authentication tokens. The NVD has not yet provided an assessment, and the weakness is classified as CWE-327.

Mitigation

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

Details

Scores and exploitation

CVSS score: 7.4(high)
CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
Attack vector: network
Attack complexity: high
Privileges required: none
User interaction: none
EPSS: 0.1%Estimated probability that this CVE is exploited in the next 30 days, from the FIRST Exploit Prediction Scoring System. Read on November 9, 2026.
Disclosure date: August 5, 2026

Weaknesses and techniques

Weakness (CWE): CWE-327
Attack pattern (CAPEC): CAPEC-20

Classification

Attack sophistication: Moderate
AI component targeted: Framework
Impact: Confidentiality
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-2026-8470

First tracked: August 5, 2026 at 08:08 PM ET, from NVD/CVE Database

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

Classifier confidence: 90% (self-assessed)