CVE-2026-61684
highpriority · track · 0OT risk · elevatedEPSS 0.004 · 33 %ileEUEPSS · scored 2026-10-27
FastGPT is a knowledge-based AI application platform. In 4.15.0-beta4, FastGPT plugin invoke reverse-call endpoints under /api/invoke/* authenticate only by verifying a JWT signed with INVOKE_TOKEN_SECRET, which defaults to the constant string token and was not set in official deployment templates. An unauthenticated attacker can self-sign an HS256 JWT and reach /api/invoke/userInfo to disclose cross-tenant user PII by attacker-supplied tmbId values, or /api/invoke/fileUpload to write attacker-controlled content into chat files. This issue is fixed in version 4.15.0-beta5.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.7–8.8
weaknesses
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affected products (1)
Products and version ranges known to be affected.
also known as (2)
Other names and identifiers for this entity.
sources
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references (12)
External citations — patches, advisories, analysis.
- https://github.com/labring/FastGPT/commit/f5f1e58b25571b7107ca49d9bf96bb2b0e0a620acnnvd
- https://github.com/labring/FastGPT/pull/7170cnnvd
- https://github.com/labring/FastGPT/releases/tag/v4.15.0-beta5cnnvd
- https://github.com/labring/FastGPT/security/advisories/GHSA-w732-rq8c-chc8cnnvd
- https://github.com/labring/FastGPT/commit/f5f1e58b25571b7107ca49d9bf96bb2b0e0a620aenisa_euvd
- https://github.com/labring/FastGPT/pull/7170enisa_euvd
- https://github.com/labring/FastGPT/releases/tag/v4.15.0-beta5enisa_euvd
- https://github.com/labring/FastGPT/security/advisories/GHSA-w732-rq8c-chc8enisa_euvd
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