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CVE-2026-18894VulnerabilityPublished

IBM Langflow OSS 1.0.0 through 1.12.4 could allow a remote attacker to trigger pre-existing stored Python component

Source GCVE Database

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Authoritative record:CVE-2026-18894· Medium 6.5

Not known to be exploited · CVSS 6.5 Medium.

Data as of 29 Oct 2026, 19:32 UTC

CVSS 3.1 base score
6.5Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (ibm)CVSS 3.16.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

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 <=1.12.4
Fixed in–

AI-suggested

Until a fix is available, restrict access to public workflows and monitor usage to mitigate risk.

Description

IBM Langflow OSS versions 1.0.0 through 1.12.4 contain a vulnerability that allows a remote attacker to execute stored Python component code within a public workflow. This execution occurs under the flow owner's runtime context on the server, bypassing intended trust boundaries that restrict public execution to server-trusted code. The vulnerability is identified as CVE-2026-18894 and has a medium severity rating with a CVSS score of 6.5.

References

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