langflow-ai langflow Bundle URL Loader code injection

published 2026-06-21 4 mo ago modified 2026-10-25 14 d ago also EUVD-2026-38203

cvss: 5.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 20%
public exploits: 0; none known

A vulnerability was identified in langflow-ai langflow up to 1.9.3. This affects an unknown function of the component Bundle URL Loader. The manipulation leads to code injection. The attack needs to be performed locally. The vendor was contacted early about this disclosure but did not respond in any way.

Patch / fix

fixed in 1

langflow langflow 1.9.3

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 4 mo ago (2026-06-23)

Exploit prediction

0.28% chance of exploitation in the next 30 days, higher than 20% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/dxz0069/softwareoverflow/blob/main/langflow_bundle_url_custom_component_startup_rce_vulndb.md referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	4.0	4.8	CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
CNA	3.1	5.3	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
CNA	3.0	5.3	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
CNA	2.0	4.3	AV:L/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR
CNA	4.0	1.9	CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CNA	3.1	5.3	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
NVD	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA	2.0	4.3	AV:L/AC:L/Au:S/C:P/I:P/A:P

Affected products

langflow-ai langflow

Classification

Weakness

CWE-94 Improper Control of Generation of Code
CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component

References

github.com /dxz0069/softwareoverflow/blob/main/langflow_bundle_url_custom_component_startup_rce_vulndb.md
related, exploit, mitigation, third-party-advisory
vuldb.com /vuln/372612
vdb-entry, third-party-advisory
vuldb.com /vuln/372612/cti
signature, permissions-required, vdb-entry
vuldb.com /cve/CVE-2026-12822
third-party-advisory, vdb-entry
vuldb.com /submit/837582
third-party-advisory, vdb-entry

Sources

CVE List CVE-2026-12822
NVD CVE-2026-12822

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary