Insufficient Authentication Brute Force Protection on Login Endpoint (CVE-2026-19297) | HOL Guard CVE

Critical · CVSS 9.1CVE-2026-19297

Insufficient Authentication Brute Force Protection on Login Endpoint

Answer in brief

CVE-2026-19297 records a Critical severity (CVSS 9.1) vulnerability in Insufficient Authentication Brute Force Protection on Login Endpoint. The current sources do not mark it as known exploited. The current feed maps IBM/Langflow OSS (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 13, 2026Updated Aug 26, 2026Source checked Sep 27, 2026First seen by HOL Aug 13, 2026Material review Aug 26, 2026

Upstream Advisory

Key facts

Risk: Critical · CVSS 9.1
Exploitation: Not marked as known exploited
Affected software: 5 mapped packages or products
Fix availability: Not reported

Why this deserves its current priority

CVSS is 9.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps IBM/Langflow OSS (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
Product	Affected versions	Fixed versions
cpe:2.3:a:langflow:langflow::::::::	Not reported	Not reported
cpe:2.3:o:apple:macos:-:::::::*	Not reported	Not reported
cpe:2.3:o:linux:linux_kernel:-:::::::*	Not reported	Not reported
cpe:2.3:o:microsoft:windows:-:::::::*	Not reported	Not reported

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
IBM/Langflow OSSgeneric	1.0.0	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for IBM/Langflow OSS.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Aug 13, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 26, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 13, 2026

Sources and claim methodology

Source referenceibm.com

Upstream source description

IBM Langflow OSS 1.0.0 through 1.9.6 could allow a remote attacker to obtain unauthorized access to user accounts due to improper restriction of excessive authentication attempts.

Quoted source text, attributed separately from HOL analysis.