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CVE-2026-6542VulnerabilityPublished

IBM Langflow OSS 1.0.0 through 1.8.4 could allow any user to supply a flow_id to read transaction logs and vertex

Source GCVE Database

0
Authoritative record:CVE-2026-6542· Medium 6.5

Not known to be exploited · CVSS 6.5 Medium.

Data as of 27 Oct 2026, 00:34 UTC

CVSS 3.1 base score
6.5Medium
How severe the flaw is on the 0–10 CVSS scale.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 30 Apr 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 <=1.8.4
Fixed in–

AI-suggested

Until a fix is available, restrict access to the affected IBM Langflow OSS versions to trusted users only and monitor for unusual access patterns related to flow_id parameters.

Description

IBM Langflow OSS versions 1.0.0 through 1.8.4 contain a vulnerability that allows any user with limited privileges to supply a flow_id parameter to access transaction logs and vertex build data belonging to other users. Additionally, this flaw permits deletion of persisted vertex build data for flows owned by other users.

References

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