gcdRadar
archive/Patch now/AIR-2026-0230
closedclosed 5 Aug 2026Patch now2 Disclosed vulnerabilityAI

CVE-2026-9205: Langflow Weak Fernet Key Derivation via random.seed()

Langflow

Langflow uses a non-cryptographic pseudo-random number generator seeded with the SECRET_KEY to derive credential encryption keys. When short secrets are used, the derived key is reproducible, allowing an attacker to decrypt stored credentials if the secret is obtained.

disclosed CVENo confirmed exploitation, so this record is tracked as a disclosed vulnerability and not counted as an incident. It moves into the counts if CISA or the vendor confirms exploitation. Why

CVSS
9.1
EPSS
<0.01 · top 77% · 2026-11-13
EPSS scores by FIRST
fix status
Fix status unknown
first report
5 Aug 2026
last update
5 Oct 2026
CVE ids
CVE-2026-9205other records

Timeline · 2

  1. 5 Aug 2026CVE-2026-9205: IBM Langflow OSS contains a weak cryptographic key derivation vulnerability in the ensure_fernet_key() function.
  2. 5 Oct 2026CVE-2026-9205: Langflow: Weak Fernet Key via random.seed()

Sources · 2

Advisories and databases

  1. 2026-08-05
    CVE-2026-9205: IBM Langflow OSS contains a weak cryptographic key derivation vulnerability in the ensure_fernet_key() function.
    NVD · nvd.nist.gov/vuln/detail/CVE-2026-9205
  2. 2026-10-05
    CVE-2026-9205: Langflow: Weak Fernet Key via random.seed()
    GitHub Advisory Database · github.com/advisories/GHSA-jxw3-mjmx-3pqm

Titles and links belong to their publishers. The summary above is written by gcdRadar in its own words; data is CC BY-SA 4.0.

Classification

lane
Patch now
AI role
Attack on AI
categories
Infrastructure vulnerabilityData leak
severity
2 · Disclosed vulnerability
fix status
Fix status unknown
targets
Framework / tooling
owasp llm top 10
LLM02:2025 Sensitive Information DisclosureLLM03:2025 Supply Chain
mitre atlas
no technique for these categories
tags
cryptolangflow
dates
happened 5 Oct 2026 · first reported 5 Aug 2026
origin
GitHub Advisory Database
Vulnerability record from NVD / the GitHub Advisory Database. This product uses the NVD API but is not endorsed or certified by the NVD.
record
confidence 0.95 · created 2026-10-18 06:33Z · updated 2026-10-18 10:04Z

Lane, AI role, categories and severity come from the classifier; the OWASP and ATLAS rows are derived from the categories. How these are assigned

Copy a brief

This record as a short Markdown brief, for a ticket, a chat or a coding agent.

the brief as text
# CVE-2026-9205: Langflow Weak Fernet Key Derivation via random.seed()

https://gcdradar.vercel.app/incidents/cve-2026-9205-langflow-weak-fernet-key-derivation-via-random · AIR-2026-0230 · closed 2026-08-05

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-08-05 (happened 2026-10-05)
- AI role: Attack on AI
- Products: Langflow
- CVE ids: CVE-2026-9205
- CVSS: 9.1

## Summary

Langflow uses a non-cryptographic pseudo-random number generator seeded with the SECRET_KEY to derive credential encryption keys. When short secrets are used, the derived key is reproducible, allowing an attacker to decrypt stored credentials if the secret is obtained.

## What to do

No action recorded; read the sources below and the vendor's advisory.

## Latest updates

- 2026-10-05: CVE-2026-9205: Langflow: Weak Fernet Key via random.seed() (https://github.com/advisories/GHSA-jxw3-mjmx-3pqm)
- 2026-08-05: CVE-2026-9205: IBM Langflow OSS contains a weak cryptographic key derivation vulnerability in the ensure_fernet_key() function. (https://nvd.nist.gov/vuln/detail/CVE-2026-9205)

## Sources

- 2026-08-05 NVD: CVE-2026-9205: IBM Langflow OSS contains a weak cryptographic key derivation vulnerability in the ensure_fernet_key() function. https://nvd.nist.gov/vuln/detail/CVE-2026-9205
- 2026-10-05 GitHub Advisory Database: CVE-2026-9205: Langflow: Weak Fernet Key via random.seed() https://github.com/advisories/GHSA-jxw3-mjmx-3pqm

Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.

Related

  1. closed7.7
    Langflow CVE-2026-19306: IBM Langflow OSS arbitrary file read and data exfiltration

    Patch now · Disclosed · since 4 Sep 2026 · CVE-2026-19306

    AI
  2. closed7.1
    Langflow CVE-2026-105699: Langflow Authenticated Cross-Project File Disclosure

    Patch now · Disclosed · since 5 Oct 2026 · updated 7 Oct 2026 · CVE-2026-105699

    AI
  3. closed9.1
    Langflow CVE-2026-7874: IBM Langflow OSS Weak Key Derivation Vulnerability

    Patch now · Disclosed · since 30 Jun 2026 · CVE-2026-7874

    AI
  4. closed8.2
    Langflow CVE-2026-10560: IBM Langflow OSS Missing Authentication Vulnerability

    Patch now · Disclosed · since 30 Jun 2026 · CVE-2026-10560

    AI
  5. closed4.3
    Langflow CVE-2026-6598: Langflow Cleartext Storage of Auth Settings

    Patch now · Disclosed · since 20 Apr 2026 · CVE-2026-6598

    AI
  6. closed6.5
    LiteLLM CVE-2026-84377: LiteLLM Authenticated SSRF and Credential Exfiltration

    Patch now · Disclosed · since 30 Sep 2026 · updated 30 Sep 2026 · CVE-2026-84377

    AI