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PatchSiren cyber security CVE debrief

CVE-2026-19304 IBM CVE debrief

IBM Langflow OSS 1.0.0 through 1.11.2 could allow a remote authenticated attacker to obtain sensitive information from internal services due to a URL parser discrepancy. This high-severity vulnerability, with a CVSS score of 7.7, affects IBM Langflow OSS installations. Defenders should assess exposure and prioritize patching to prevent potential sensitive information disclosure. The vulnerability is caused by a URL parser discrepancy, which could allow attackers to access internal services.

Vendor
IBM
Product
Langflow OSS
CVSS
HIGH 7.7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-04
Original CVE updated
2026-09-28
Advisory published
2026-09-04
Advisory updated
2026-09-28

Who should care

Defenders responsible for IBM Langflow OSS installations should assess exposure and prioritize patching to prevent potential sensitive information disclosure.

Why it matters

CVE-2026-19304 is a high-severity vulnerability in IBM Langflow OSS that could allow remote authenticated attackers to obtain sensitive information. Defenders should prioritize verifying and patching installations to prevent potential sensitive information disclosure.

  • Verify and patch IBM Langflow OSS installations to prevent potential sensitive information disclosure
  • Update inventory of IBM Langflow OSS installations to ensure accurate tracking
  • Monitor IBM Langflow OSS for suspicious activity that may indicate exploitation

Technical summary

IBM Langflow OSS 1.0.0 through 1.11.2 is vulnerable to a URL parser discrepancy that could allow a remote authenticated attacker to obtain sensitive information from internal services. The vulnerability has a CVSS score of 7.7 and is considered high-severity. The issue arises from a discrepancy in the URL parser, which could enable attackers to access internal services and obtain sensitive information.

Defensive priority

Defenders should prioritize verifying and patching IBM Langflow OSS installations to prevent potential sensitive information disclosure.

Recommended defensive actions

  • Verify and apply IBM Langflow OSS patches to prevent potential sensitive information disclosure
  • Review and update inventory of IBM Langflow OSS installations
  • Monitor IBM Langflow OSS for suspicious activity

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its CVSS score of 7.7 and a description of the issue. IBM has provided a vendor advisory for the vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-19304 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-19304

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-19304 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-19304

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.