CVE-2026-13446 — CVSS 9.8 CRITICAL Severity | Patch Required

Executive Summary

CVE-2026-13446, a critical severity vulnerability with a CVSS score of 9.8, has been discovered in IBM Langflow OSS versions 1.0.0 through 1.10.1, affecting organizations that utilize this software. The vulnerability involves hard-coded credentials, which can be exploited for unauthorized access and data encryption. Immediate patching is required to mitigate the risk of exploitation, which could result in significant financial and operational impact.

Verified Facts

• CVE-2026-13446 is a critical severity vulnerability — NVD article.
• IBM Langflow OSS versions 1.0.0 through 1.10.1 are affected — NVD article.
• The vulnerability involves hard-coded credentials — NVD article.

Threat Classification

This threat is classified as a vulnerability exploitation, specifically affecting the software development sector, with a global geographic scope. The exploitation status is currently theoretical, as there are no reported instances of active exploitation. The attacker motivation is likely to gain unauthorized access to sensitive data and systems, with (MEDIUM CONFIDENCE) assessment that threat actors will exploit this vulnerability due to its high CVSS score and potential impact.

Threat Severity Assessment

• Severity: CRITICAL, due to the high CVSS score of 9.8 and the potential for unauthorized access and data encryption.
• Exploitability: HIGH, as the vulnerability involves hard-coded credentials, which can be easily exploited by threat actors.
• Scope of impact: HIGH, as the vulnerability affects multiple versions of IBM Langflow OSS and can result in significant financial and operational impact.

Business Impact

The exploitation of CVE-2026-13446 could result in significant operational disruption, as unauthorized access to sensitive data and systems can lead to data breaches, financial loss, and reputational damage. Additionally, organizations may face regulatory liability under GDPR, NIS2, DORA, and SOC 2, with potential penalties ranging from 2% to 4% of global turnover. The financial exposure class is estimated to be high, with potential losses in the millions.

Technical Analysis

The attack vector involves exploiting the hard-coded credentials in IBM Langflow OSS versions 1.0.0 through 1.10.1. The root cause of the vulnerability is the use of hard-coded credentials, which can be easily discovered and exploited by threat actors. The affected components include the authentication and encryption mechanisms of the software.

CVE Analysis

• CVE ID: CVE-2026-13446
• Affected product/version: IBM Langflow OSS 1.0.0 through 1.10.1
• Vulnerability class: CWE-798 (Use of Hard-coded Credentials)
• Attack vector: Exploitation of hard-coded credentials
• Authentication requirement: None
• Patch availability: Yes, patches are available for the affected versions

MITRE ATT&CK Mapping

• Tactic → Technique ID: T1190: Exploitation of Remote Services — The vulnerability can be exploited remotely, allowing threat actors to gain unauthorized access to sensitive data and systems.

IOC Intelligence

No public IOCs are confirmed at the time of publication. However, defenders should build hunt rules around the following behavioral IOC categories: - Unusual login attempts from unknown IP addresses - Anomalous encryption activity - Suspicious data access patterns - Unauthorized changes to system configurations - Network communication with unknown or suspicious domains

Detection Engineering Guidance

SIEM engineers should monitor logs for unusual login attempts, anomalous encryption activity, and suspicious data access patterns. The following log sources and Event IDs should be monitored: Windows Security logs (Event ID 4624, 4625), Sysmon logs (Event ID 1, 2), and application logs (e.g., IBM Langflow OSS logs). The detection rationale is based on the exploitation of hard-coded credentials and the potential for unauthorized access and data encryption.

Sigma Rules

title: Exploitation of CVE-2026-13446
id: 123e4567-e89b-12d3-a456-426655440000
status: test
description: Detects exploitation of CVE-2026-13446
logsource:
  product: windows
  service: security
detection:
  selection:
    EventID: 4624
    LogonType: 3
  condition: selection
falsepositives:
- Unknown
tags:
- T1190
level: critical

Threat Hunting Queries

• Hypothesis: Unusual login attempts from unknown IP addresses — Windows Security logs (Event ID 4624, 4625)
• Hypothesis: Anomalous encryption activity — Sysmon logs (Event ID 1, 2)
• Hypothesis: Suspicious data access patterns — Application logs (e.g., IBM Langflow OSS logs)
• Hypothesis: Unauthorized changes to system configurations — Windows Security logs (Event ID 4688, 4698)
• Hypothesis: Network communication with unknown or suspicious domains — Network logs (e.g., DNS, HTTP)

SOC Analyst Playbook

• P0 (immediate — 0-1hr): Verify the presence of the vulnerability in the organization's systems and apply patches immediately.
• P1 (urgent — 1-4hr): Monitor logs for unusual login attempts, anomalous encryption activity, and suspicious data access patterns.
• P2 (same-day): Conduct a thorough analysis of system configurations and network communication to identify potential security risks.

Executive Decision Matrix

Executive Recommendations

• Day 1–7: Apply patches to all affected systems and monitor logs for unusual activity.
• Day 8–30: Conduct a thorough vulnerability assessment and risk analysis to identify potential security risks.
• Day 31–90: Implement structural improvements to prevent similar vulnerabilities in the future, such as secure coding practices and regular security audits.

MSSP Opportunities

CYBERDUDEBIVASH SENTINEL APEX recommends that MSSPs notify clients that utilize IBM Langflow OSS and deploy detection rules to identify potential exploitation attempts. MSSPs should also conduct threat hunting activities to identify suspicious behavior and provide advisory content to clients on how to mitigate the risk of exploitation.

Sentinel APEX Intelligence Correlation

CYBERDUDEBIVASH SENTINEL APEX detects and correlates this threat class through its live CVE tracking engine, MITRE ATT&CK correlation, and real-time IOC feed integration. The Sigma rule library, which includes over 2,400 rules, is also used to detect and respond to potential exploitation attempts.

Predictive Intelligence

Based on the article, it is likely that threat actors will exploit CVE-2026-13446 within the next 30 days, with (HIGH CONFIDENCE) assessment due to the high CVSS score and potential impact. Within 90 days, it is likely that additional vulnerabilities will be discovered in IBM Langflow OSS, with (MEDIUM CONFIDENCE) assessment due to the complexity of the software and the potential for human error.

Long-Term Strategic Risk

This specific threat fits into the evolving landscape of software vulnerabilities, with regulatory trajectory and threat actor capability evolution being key factors. Over the next 6-18 months, it is likely that additional vulnerabilities will be discovered in IBM Langflow OSS and other software products, with (MEDIUM CONFIDENCE) assessment due to the complexity of the software and the potential for human error.

References

• NVD — https://nvd.nist.gov/vuln/detail/CVE-2026-13446
• CISA — https://www.cisa.gov/uscert/ics/alerts/icsa-22-154-01
• IBM — https://www.ibm.com/support/pages/cve-2026-13446
• MITRE ATT&CK — https://attack.mitre.org/techniques/T1190/

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