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VulnerabilityPublished

CVE-2026-93680: IBM Langflow OSS · Improper Authentication

Affects IBM Langflow OSSSource CVE Database V5

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Not known to be exploited · CVSS 9.8 Critical.

Data as of 29 Oct 2026, 15:53 UTC

CVSS 3.1 base score
9.8Critical
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (ibm)CVSS 3.19.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 29 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  4. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
IBMLangflow OSSAffected
  • >=1.0.0 <=1.12.8
Fixed in–

CPE configurations (2)

  • cpe:2.3:a:ibm:langflow_oss:1.0.0:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:langflow_oss:1.12.8:*:*:*:*:*:*:*

AI-suggested

Until a fix is available, restrict network access to the affected versions and monitor for any suspicious activity related to authentication bypass attempts.

Description

IBM Langflow OSS versions 1.0.0 through 1.12.8 contain an improper authentication vulnerability (CWE-287) that allows remote attackers to bypass security restrictions. This flaw can lead to full compromise of confidentiality, integrity, and availability of the affected system. The vulnerability is rated critical with a CVSS score of 9.8.

References

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