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CVE-2026-90535

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

CVSS 4.0 6.3 MEDIUMCheck source for fixed versionsKEV status unknown
Original advisory

cve-program · CVE-2026-90535

Published

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.

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Affected versions, risk and source history

Exploitation and risk

Source status

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cve-program · CVE-2026-90535

Published

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

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.

Source published
12 Sep 2026 12:08:44 UTC
Source modified
14 Sep 2026 16:04:39 UTC
Saved here
23 Oct 2026 15:48:27 UTC
Source terms
CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

Source: cve-program · CVE Program Terms of Use. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS 4.0 · 6.3 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

ChangeIntel

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Sources read 13 Nov 16:22 UTC · 274 of 275 readable · 273 fully read · documentation 469/469 current

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