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  4. CVE 2026 12821 flowiseai flowise s3 document loader s3ts path
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Back to active CVEs
Medium · CVSS 5.3CVE-2026-12821

FlowiseAI Flowise S3 Document Loader S3.ts path traversalCVE-2026-12821

Answer in brief

CVE-2026-12821 records a Medium severity (CVSS 5.3) vulnerability in FlowiseAI Flowise S3 Document Loader S3.ts path traversal. The current sources do not mark it as known exploited. The current feed maps FlowiseAI/Flowise (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 Jun 21, 2026Updated Oct 25, 2026Source checked Nov 3, 2026First seen by HOL Jun 22, 2026Material review Oct 25, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 5.3
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Not reported

Why this deserves its current priority

CVSS is 5.3. 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 FlowiseAI/Flowise (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
FlowiseAI/Flowisegeneric3.1.0 || 3.1.1 || 3.1.2Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for FlowiseAI/Flowise.
  2. 2Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

  1. Published upstream

    Jun 21, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 25, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Jun 22, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • Source referencevuldb.com
  • Source referencevuldb.com
  • Source referencevuldb.com
  • Source referencevuldb.com
Upstream source description

A vulnerability was determined in FlowiseAI Flowise up to 3.1.2. The impacted element is an unknown function of the file packages/components/nodes/documentloaders/S3/S3.ts of the component S3 Document Loader. Executing a manipulation can lead to path traversal. It is possible to launch the attack remotely. The vendor was contacted early about this disclosure but did not respond in any way.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • BuddyPress XProfile Image Field <= 3.1.0 - Unauthenticated Arbitrary File Deletion via Signup Image Field Activation HandlerAlso CWE-22
  • Academy LMS <= 4.0.1 - Authenticated (Contributor+) Arbitrary HTML File Read via 'id' Parameter in /wp/v2/templates REST RouteAlso CWE-22
  • Contact Form Extender for Divi Builder <= 1.0.6 - Unauthenticated Arbitrary File Deletion via Path TraversalAlso CWE-22
  • FluentCart A New Era of eCommerce <= 1.6.2 - Authenticated (Custom+) Arbitrary File Deletion via 'file_path' ParameterAlso CWE-22
  • Improper limitation of paths in py-aspect-model-loaderAlso CWE-22

Record context

Vulnerability class
Path Traversal
EPSS
Not reported
CWE IDs
CWE-22
Source
CVE List V5
Source checked
Nov 3, 2026
References
5 linked sources
Open source record