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CVE-2026-61684

HIGH Exploitation: PoC
8.8
CVSS 4.0
Description
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.

Metadata

CVE ID
CVE-2026-61684
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-07-10 18:36 UTC
Published
2026-07-15 14:28 UTC
Last updated
2026-07-15 15:07 UTC
Primary CWE
CWE-798
CWE-798: Use of Hard-coded Credentials
Vendor / Product
labring / FastGPT
Sources
cve.org  ·  NVD

Severity & Metrics

8.8 HIGH CVSS 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
SSVC — CISA Coordinator
Exploitation
PoC
Automatable
yes
Tech. Impact
partial
Affected products (1)
VendorProductPlatformVersions
labring FastGPT — = 4.15.0-beta4
Weakness (CWE)
CWESourceDescription
CWE-798 cna CWE-798: Use of Hard-coded Credentials
CVSS scores (1)
ScoreSeverityVersionSourceVector
8.8 HIGH 4.0 cna CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
References (4)
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