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VulnerabilityPublished

CVE-2026-13442: IBM Langflow OSS · .NET Misconfiguration: Use of Impersonation

Affects IBM Langflow OSSSource CVE Database V5

0

Not known to be exploited · CVSS 7.1 High.

Data as of 27 Oct 2026, 17:11 UTC

CVSS 3.1 base score
7.1High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 22% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 28 Jul 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

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

    Not in CISA KEV and no source reports exploitation

  5. 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 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
IBMLangflow OSSAffected
  • >=1.0.0 <=1.10.1
Fixed in–

CPE configurations (2)

  • cpe:2.3:a:ibm:langflow_oss:1.0.0:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:langflow_oss:1.10.1:*:*:*:*:*:*:*

AI-suggested

Until a fix is available, restrict access privileges to trusted users only and monitor for suspicious activity related to FAISS namespace usage. Avoid sharing credentials or namespaces across users to minimize risk.

Description

IBM Langflow OSS versions 1.0.0 through 1.10.1 contain a misconfiguration vulnerability involving the use of impersonation. This flaw allows an attacker with limited privileges to reuse another user's FAISS namespace, leading to unauthorized access to owner-only vector content and the ability to influence subsequent query results. The vulnerability results in cross-user information disclosure and limited integrity impact through persistent poisoning of returned results.

References

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