CVE-2026-58057: Flowise · Improper Handling of Case Sensitivity
Affects FlowiseSource GCVE Database
Public exploit available (Exploit-DB) · CVSS 5.0 Medium : upgrade to 3.1.3 as a priority.
Data as of 26 Oct 2026, 13:47 UTC
- EPSS
- 1.5% chance of exploitation in 30 days – higher than 75% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 3.1.3
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:LExploitation evidence
t = 0 is the CVE’s publication on cve.org
Disclosed: evidence found.
CVE published 28 Jun 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: evidence found.
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
Timeline
CVE ID reserved
by VulnCheck
, 38 minutes before disclosure
CVE published
on cve.org
, t = 0
First Exploit-DB entry (opens in a new tab)
Flowise 3.1.3 - arbitrary code execution
, 9 days after disclosure
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
Upgrade Flowise to 3.1.3.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Flowise Flowise | Affected
| Fixed in
|
AI-suggested
If you cannot patch yet, restrict access to authenticated users who can configure Custom MCP nodes and monitor for suspicious activity related to environment variable manipulation.
Description
CVE-2026-58057 is a vulnerability in Flowise versions before 3.1.3 where case-sensitive validation of environment variables allows bypass of a denylist on Windows systems. An authenticated user able to configure a Custom MCP node can exploit this to inject NODE_OPTIONS and execute arbitrary code on the Flowise server.