CVE-2026-18899: CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in IBM Langflow OSS
Description
IBM Langflow OSS versions 1.0.0 through 1.11.1 contain a path traversal vulnerability (CWE-22) that allows remote attackers to read arbitrary files. This vulnerability can be exploited without authentication and does not require user interaction. The vulnerability has a high severity with a CVSS score of 7.5. No official patch or remediation information is currently provided.
CVSS v3.1
Score 7.5high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-18899 is a path traversal vulnerability in IBM Langflow OSS versions 1.0.0 through 1.11.1. It allows remote attackers to read arbitrary files on the affected system by bypassing pathname restrictions. The vulnerability is classified under CWE-22 and has a CVSS 3.1 base score of 7.5, indicating high severity. There is no indication of known exploits in the wild or available patches at this time.
Potential Impact
Successful exploitation of this vulnerability allows an unauthenticated remote attacker to read arbitrary files on the affected system, potentially exposing sensitive information. The vulnerability does not impact integrity or availability, but confidentiality is fully compromised.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are currently available. Until a patch is released, restrict access to the affected service and monitor for suspicious activity related to file access attempts.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-4w6q-3qxv-hmwg
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-18899"]
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6a92f7dfacd9273b49e75b98
Added to database: 08/29/2026, 15:16:47 UTC
Last enriched: 09/08/2026, 02:22:29 UTC
Last updated: 10/12/2026, 18:48:18 UTC
Views: 59
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.