CVE Explorer
CVE-2026-56277
Flowise before 3.1.2 sets Access-Control-Allow-Origin to a hardcoded wildcard (*) on its text-to-speech (TTS) generation endpoint (packages/server/src/controllers/text-to-speech/index.ts), independent of the server's configured CORS policy. This bypasses the server's otherwise restrictive default CORS configuration (getCorsOptions()) and allows any webpage to make cross-origin requests that trigger TTS generation using stored credentials, enabling drive-by cross-origin credential abuse.
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"defaultStatus":"unaffected","packageURL":"pkg:npm/flowise","product":"Flowise","vendor":"Flowise","versions":[{"lessThan":"3.1.2","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"3.1.2","versionType":"semver"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:2a4216691a92b4caca58825cde0fce3a77f6696f45656810b74985add0d1d7f0 · sha256:62d4324062b3d24d… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":6.9,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"LOW"},"metric_type":"cvssV4_0"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:2a4216691a92b4caca58825cde0fce3a77f6696f45656810b74985add0d1d7f0 · sha256:62d4324062b3d24d… · /containers/cna/metrics/0/cvssV4_0
CWE assertions
1 source assertion{"cweId":"CWE-346","description":"Origin Validation Error","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:2a4216691a92b4caca58825cde0fce3a77f6696f45656810b74985add0d1d7f0 · sha256:62d4324062b3d24d… · /containers/cna/problemTypes/0/descriptions/0
Source references
2 source assertions{"name":"GitHub Security Advisory (GHSA-m837-xvxr-vqwg)","tags":["vendor-advisory"],"url":"https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-m837-xvxr-vqwg"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:2a4216691a92b4caca58825cde0fce3a77f6696f45656810b74985add0d1d7f0 · sha256:62d4324062b3d24d… · /containers/cna/references/0
{"name":"VulnCheck Advisory: Flowise - Hardcoded CORS Wildcard in TTS Endpoint","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/flowise-hardcoded-cors-wildcard-in-tts-endpoint"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:2a4216691a92b4caca58825cde0fce3a77f6696f45656810b74985add0d1d7f0 · sha256:62d4324062b3d24d… · /containers/cna/references/1
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.