Medium 6.3Published Sep 12, 2026

CVE-2026-90535Flowise before 3.1.4 Denial of Service via text-to-speech/abort

Updated under an hour ago (2026-10-19 06:20 UTC)

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It affects FlowiseAI Flowise. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for FlowiseAI Flowise

Exploited in the last 30 days

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.

CVSS: 6.3 MEDIUM (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Weakness (CWE): CWE-862
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Analyzed
Record last updated: Sep 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

FlowiseAI Flowise flowiseai:flowise (from the name)	before 3.1.4; 3.1.4 not affected	CNA record
flowiseai flowise flowiseai:flowise	before 3.1.4	NVD

References

https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-xhxx-56g3-mx2rvendor-advisory, exploit
https://www.vulncheck.com/advisories/flowise-before-3.1.4-denial-of-service-via-text-to-speech-abortthird-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.