CVE-2026-18545: CWE-918 Server-Side Request Forgery (SSRF) in IBM Langflow OSS
Description
IBM Langflow OSS versions 1.0.0 through 1.11.1 contain a server-side request forgery (SSRF) vulnerability. An authenticated attacker could exploit this flaw to send unauthorized requests from the affected system. This may enable network enumeration or assist in other attacks. The vulnerability has a medium severity rating with a CVSS score of 4.3. No official patch or remediation guidance has been provided by the vendor at this time.
CVSS v3.1
Score 4.3medium
Affected software
IBM
Langflow OSS
cpe:2.3:a:ibm:langflow_oss:1.0.0:*:*:*:*:*:*:*cpe:2.3:a:ibm:langflow_oss:1.11.1:*:*:*:*:*:*:*Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-18545 is a server-side request forgery (SSRF) vulnerability in IBM Langflow OSS versions 1.0.0 through 1.11.1. This vulnerability allows an authenticated attacker to cause the system to make unauthorized requests, potentially leading to network reconnaissance or facilitating further attacks. The CVSS 3.1 base score is 4.3, reflecting a medium severity with network attack vector, low attack complexity, and requiring low privileges but no user interaction. No vendor advisory or patch information is currently available.
Potential Impact
An attacker with authentication privileges can exploit this SSRF vulnerability to make unauthorized requests from the affected system. This could lead to network enumeration or assist in other attack scenarios. The impact on confidentiality is low, with no direct integrity or availability impact reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict access to authenticated users and monitor for suspicious activity related to request forwarding. Follow IBM's official communications for updates on patches or mitigations.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-07-31T21:21:10.287Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a9206c1acd9273b4963cdfc
Added to database: 08/28/2026, 22:08:01 UTC
Last enriched: 09/07/2026, 15:22:28 UTC
Last updated: 10/11/2026, 06:48:15 UTC
Views: 59
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