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
Not known to be exploited · CVSS 6.5 Medium.
Data as of 27 Oct 2026, 00:34 UTC
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:NExploitation evidence
Disclosed: evidence found.
CVE published 30 Apr 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| IBMLangflow OSS | Affected
| 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.