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CVE-2026-104339VulnerabilityPublished

IBM Langflow OSS 1.0.0 through 1.12.3 could allow a remote attacker to execute arbitrary code due to improper

Source GCVE Database

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Authoritative record:CVE-2026-104339· Critical 9.8

Not known to be exploited · CVSS 9.8 Critical.

Data as of 29 Oct 2026, 20:00 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. Weaponized: 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 29 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
IBMLangflow OSSAffected
  • >=1.0.0 <=1.12.3
Fixed in–

AI-suggested

Until a fix is available, restrict network access to the affected application and monitor for suspicious activity related to command injection attempts.

Description

IBM Langflow OSS versions 1.0.0 through 1.12.3 contain a critical vulnerability that allows remote attackers to execute arbitrary code. This is due to improper neutralization of special elements used in operating system commands, classified under CWE-94. The vulnerability has a high CVSS score of 9.8, indicating severe impact on confidentiality, integrity, and availability.

References

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