Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-90535

CVE-2026-90535MEDIUM

FlowiseAI Flowise — Flowise before 3.1.4 Denial of Service via text-to-speech/abort

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   L   P   N   N   N   N   L    6.3   .0048   39.4     —

AFFECTED
  Product  Versions     Fixed
  Flowise  unspecified  3.1.4

TIMELINE
  Sep 12  Reserved by VulnCheck
  Sep 12  Published (CNA: VulnCheck)
  Sep 15  EXPLOIT PUBLISHED — CVE-2026-90535 (FlowiseAI Flowise). Public exploit reference added.

CWE-862 · CNA: VulnCheck · CVSS v4.0 · 2 references · NVD status: Analyzed

Description

Flowise versions before 3.1.4 contain an unauthenticated denial of service vulnerability in the /api/v1/text-to-speech/abort endpoint that accepts user-supplied chatflowId and chatId without ownership verification. Attackers can terminate active chatflow predictions for any user by submitting requests with known chatflow and chat identifiers, causing targeted service disruption.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
September 12, 2026	Reserved	Reserved by VulnCheck
September 12, 2026	Published	Published (CNA: VulnCheck)
September 15, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-90535 (FlowiseAI Flowise). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
FlowiseAI	Flowise	—	—	3.1.4

Weaknesses

CWE-862

References (2)

https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-xhxx-56g3-mx2r [Exploit, Vendor Advisory]
https://www.vulncheck.com/advisories/flowise-before-3.1.4-denial-of-service-via-text-to-speech-abort [Third Party Advisory]

Authoritative record: CVE-2026-90535 at cve.org

Vendors: flowiseai

Weaknesses: CWE-862

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-90535 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.