Security Bulletin
Summary
Langflow OSS is affected by multiple vulnerabilities involving code execution, server-side requests, access controls, file handling, and a development workflow. Depending on the affected feature and deployment configuration, an attacker could execute code, disclose sensitive information, access or modify other users' data, or disrupt service.
Vulnerability Details
CVEID: CVE-2026-104324
DESCRIPTION: Langflow OSS could allow a remote authenticated attacker to execute arbitrary code due to deserialization of untrusted data.
CWE: CWE-502: Deserialization of Untrusted Data
CVSS Source: IBM
CVSS Base score: 8.8
CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
CVEID: CVE-2026-104312
DESCRIPTION: Langflow OSS could allow an authenticated attacker to produce a server-generated ZIP archive containing entry paths that traverse outside the intended extraction directory. Extraction of the archive by a victim using a non-sanitizing tool could result in arbitrary file write on the victim's host.
CWE: CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CVSS Source: IBM
CVSS Base score: 3.5
CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N)
CVEID: CVE-2026-104316
DESCRIPTION: Langflow OSS could allow an authenticated attacker to cancel any victim's running background workflow job by sending a single HTTP request, resulting in loss of in-progress compute work with no flow-level permission check.
CWE: CWE-285: Improper Authorization
CVSS Source: IBM
CVSS Base score: 6.5
CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
CVEID: CVE-2026-104328
DESCRIPTION: Langflow OSS could allow a remote authenticated attacker to execute arbitrary code due to improper neutralization of special elements used in an OS command.
CWE: CWE-94: Improper Control of Generation of Code ('Code Injection')
CVSS Source: IBM
CVSS Base score: 8.8
CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
CVEID: CVE-2026-104310
DESCRIPTION: Langflow OSS could allow a remote authenticated attacker to obtain sensitive information due to a server-side request forgery (SSRF) vulnerability.
CWE: CWE-918: Server-Side Request Forgery (SSRF)
CVSS Source: IBM
CVSS Base score: 4.3
CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N)
CVEID: CVE-2026-102590
DESCRIPTION: Langflow OSS could allow a remote authenticated attacker to obtain sensitive information due to a server-side request forgery vulnerability.
CWE: CWE-918: Server-Side Request Forgery (SSRF)
CVSS Source: IBM
CVSS Base score: 5
CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N)
CVEID: CVE-2026-104314
DESCRIPTION: Langflow OSS could allow an authenticated attacker with a read or share grant on a target flow to retrieve the flow owner's stored third-party credentials in cleartext from the API response.
CWE: CWE-522: Insufficiently Protected Credentials
CVSS Source: IBM
CVSS Base score: 6.5
CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N)
CVEID: CVE-2026-104339
DESCRIPTION: Langflow OSS could allow a remote attacker to execute arbitrary code due to improper neutralization of special elements used in an OS command.
CWE: CWE-94: Improper Control of Generation of Code ('Code Injection')
CVSS Source: IBM
CVSS Base score: 9.8
CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
CVEID: CVE-2026-77819
DESCRIPTION: Langflow OSS could allow a remote authenticated attacker to overwrite arbitrary files due to improper limitation of a pathname to a restricted directory.
CWE: CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CVSS Source: IBM
CVSS Base score: 6.5
CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N)
CVEID: CVE-2026-104315
DESCRIPTION: Langflow oSS is vulnerable to server-side request forgery (SSRF). This may allow an authenticated attacker to send unauthorized requests from the system, potentially leading to network enumeration or facilitating other attacks.
CWE: CWE-918: Server-Side Request Forgery (SSRF)
CVSS Source: IBM
CVSS Base score: 4.3
CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N)
CVEID: CVE-2026-101288
DESCRIPTION: Langflow OSS could allow a remote authenticated attacker to execute arbitrary code due to improper neutralization of special elements used in code.
CWE: CWE-94: Improper Control of Generation of Code ('Code Injection')
CVSS Source: IBM
CVSS Base score: 8.8
CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
CVEID: CVE-2026-103092
DESCRIPTION: Langflow OSS could allow a remote authenticated attacker to execute arbitrary SQL commands due to improper access control
CWE: CWE-284: Improper Access Control
CVSS Source: IBM
CVSS Base score: 8.5
CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:L)
CVEID: CVE-2026-104308
DESCRIPTION: Langflow OSS could allow a remote authenticated attacker to cause a denial of service due to improper neutralization of special elements used in an OS command.
CWE: CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CVSS Source: IBM
CVSS Base score: 4.3
CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L)
CVEID: CVE-2026-104309
DESCRIPTION: Langflow OSS could allow a remote authenticated attacker to obtain sensitive information due to improper limitation of a pathname to a restricted directory.
CWE: CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CVSS Source: IBM
CVSS Base score: 6.5
CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N)
CVEID: CVE-2026-104317
DESCRIPTION: Langflow OSS could allow a remote attacker who could reach the message broker to execute arbitrary code on the system due to the deserialization of untrusted data.
CWE: CWE-502: Deserialization of Untrusted Data
CVSS Source: IBM
CVSS Base score: 8.1
CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)
CVEID: CVE-2026-104331
DESCRIPTION: Langflow OSS is vulnerable to server-side request forgery (SSRF). This may allow an authenticated attacker to send unauthorized requests from the system, potentially leading to network enumeration or facilitating other attacks.
CWE: CWE-918: Server-Side Request Forgery (SSRF)
CVSS Source: IBM
CVSS Base score: 5.4
CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N)
Affected Products and Versions
| Affected Product(s) | Version(s) |
| Langflow OSS | 1.0.0 - 1.12.3 |
Remediation/Fixes
IBM strongly recommends addressing the vulnerability now by upgrading Langflow OSS to version 1.12.4.
For Langflow OSS versions 1.0.0 - 1.12.3, follow the Prepare to upgrade instructions and release-specific configuration changes, including backing up your existing installation, then follow the Langflow OSS installation instructions to install version 1.12.4 and test your flows.
Workarounds and Mitigations
None
Get Notified about Future Security Bulletins
References
Acknowledgement
Change History
19 Oct 2026: Initial Publication
*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.
Disclaimer
According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY. In addition to other efforts to address potential vulnerabilities, IBM periodically updates the record of components contained in our product offerings. As part of that effort, if IBM identifies previously unidentified packages in a product/service inventory, we address relevant vulnerabilities regardless of CVE date. Inclusion of an older CVEID does not demonstrate that the referenced product has been used by IBM since that date, nor that IBM was aware of a vulnerability as of that date. We are making clients aware of relevant vulnerabilities as we become aware of them. "Affected Products and Versions" referenced in IBM Security Bulletins are intended to be only products and versions that are supported by IBM and have not passed their end-of-support or warranty date. Thus, failure to reference unsupported or extended-support products and versions in this Security Bulletin does not constitute a determination by IBM that they are unaffected by the vulnerability. Reference to one or more unsupported versions in this Security Bulletin shall not create an obligation for IBM to provide fixes for any unsupported or extended-support products or versions.
Document Location
Worldwide
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Document Information
Modified date:
19 October 2026
Initial Publish date:
19 October 2026
UID
ibm17293015