CVE-2026-55255

🗓️ 23 Jun 2026 16:28:20Reported by GitHub_MType

cve🔗 web.nvd.nist.gov📰️ 9 Media mentions👁 346 Views🌐 WEB

CVE-2026-55255 Langflow IDOR flaw in /api/v1/responses enables access to another user's flow; fixed in 1.9.2.

Reporter	Title	Published	Views	Family All 20
GithubExploit	Exploit for Authorization Bypass Through User-Controlled Key in Langflow	30 Jun 202614:49	–	githubexploit
ATTACKERKB	CVE-2026-55255	23 Jun 202616:28	–	attackerkb
Circl	CVE-2026-55255	19 Jun 202613:17	–	circl
CISA KEV Catalog	Langflow Authorization Bypass Through User-Controlled Key Vulnerability	7 Jul 202600:00	–	cisa_kev
Cvelist	CVE-2026-55255 Langflow: IDOR Vulnerability in `/api/v1/responses` Endpoint Allows Authenticated Attackers to Access Another User's Flow	23 Jun 202616:28	–	cvelist
EUVD	EUVD-2026-38517	23 Jun 202616:28	–	euvd
Github Security Blog	Langflow: IDOR Vulnerability in `/api/v1/responses` Endpoint Allows Authenticated Attackers to Access Another User's Flow	19 Jun 202621:16	–	github
Tenable Nessus	Langflow < 1.9.1 Multiple Vulnerabilities	10 Jul 202600:00	–	nessus
NVD	CVE-2026-55255	23 Jun 202617:17	–	nvd
OSV	CVE-2026-55255 Langflow: IDOR Vulnerability in `/api/v1/responses` Endpoint Allows Authenticated Attackers to Access Another User's Flow	23 Jun 202616:28	–	osv

NVD

Vulners

Node

langflow langflowRange<1.9.1

[
  {
    "vendor": "langflow-ai",
    "product": "langflow",
    "versions": [
      {
        "version": "< 1.9.1",
        "status": "affected"
      }
    ]
  }
]

Source	Link
github	www.github.com/langflow-ai/langflow/security/advisories/GHSA-qrpv-q767-xqq2
github	www.github.com/langflow-ai/langflow/pull/12832
github	www.github.com/langflow-ai/langflow/commit/2c9f498d664a3c32698b57d7c5e752625291060e
cisa	www.cisa.gov/known-exploited-vulnerabilities-catalog
webflow	www.webflow.sysdig.com/blog/understanding-langflow-cve-2026-55255-and-why-higher-cvss-vulnerabilities-arent-always-the-most-exploited

Parameter	Position	Path	Description	CWE
model	request body	/api/v1/responses	Insecure Direct Object Reference on the Responses API allows cross-user execution by supplying a victim flow UUID in the model field.	CWE-639

08 Jul 2026 13:39Current

6Medium risk

Vulners AI Score6

CVSS 3.18.4

EPSS0.0056

SSVC