FastGPT
CVE-2026-68929
CRITICAL
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Endpoints authorize on a public shareId with no auth (PR:N, AV:N, AC:L); attacker reads private responses (C:H), rebinds the channel (I:H), and can offline the bot (A:H), all on one system so S:U.
Primary rating from Vendor (GitHub_M).
CVSS VectorVendor: GitHub_M
Lifecycle Timeline
3DescriptionCVE.org
FastGPT is an open-source LLM platform for building AI applications on a knowledge base. In versions prior to 4.15.2, the WeChat (iLink) share-channel endpoints authorize requests using only the public shareId, with no authenticated identity or team-ownership check. As a result, an unauthenticated attacker who knows a victim team's shareId can take that team's WeChat bot offline or hijack the channel to their own bot: the logout endpoint is gated only by an existence check yet wipes the outLink's stored WeChat token, and the QR-code status endpoint performs no authorization at all and writes attacker-supplied bot credentials into the outLink identified by shareId. By generating a QR for a victim shareId, scanning it with their own WeChat, and calling the status endpoint, an attacker binds the victim team's app to the attacker's bot, exposing the app's private responses, displacing the legitimate binding, and consuming the victim's resources. The shareId is exposed in every shared chat URL, iframe, and embed, so it is not a secret. This issue is fixed in version 4.15.2.
AnalysisAI
Channel hijack and denial of service in FastGPT (labring/FastGPT) before 4.15.2 lets an unauthenticated remote attacker take over or disable a victim team's WeChat (iLink) bot binding. The WeChat share-channel endpoints authorize on the public shareId alone with no identity or team-ownership check, so an attacker who reads a shareId from any shared chat URL can wipe the stored WeChat token (offlining the bot) or bind the app to their own bot to siphon the team's private responses. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires that the victim team has configured and bound a WeChat (iLink) share channel/outLink in FastGPT, and that the attacker knows the victim's shareId - which is not a secret because it appears in every shared chat URL, iframe, and embed. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The supplied CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H) scores 9.3 and is consistent with the description: fully remote, low complexity, no privileges or user interaction, with high confidentiality, integrity, and availability impact on the vulnerable system and no scope/subsequent-system change. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade to FastGPT 4.15.2, which adds proper team-ownership and management-permission checks to the WeChat share-channel endpoints (Vendor-released patch: 4.15.2). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all FastGPT deployments and confirm which versions are running, then verify whether WeChat bot integration is enabled in your environment. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
FastGPT is an AI Agent building platform. Prior to version 4.9.12, the LastRoute Parameter on login page is vulnerable t
Unauthenticated HTTP proxy abuse in FastGPT (AI Agent platform) prior to v4.14.9.5 allows remote attackers to relay arbi
Remote code execution in FastGPT's agent-sandbox component (versions 4.14.10 through 4.14.12) lets any network-adjacent,
NoSQL injection in FastGPT <4.14.9.5 password authentication allows unauthenticated remote attackers to bypass login con
GitHub Actions artifact-poisoning (pwn request) in labring/FastGPT allows an external attacker who opens a pull request
NoSQL injection in FastGPT versions before 4.14.9.5 allows authenticated attackers to bypass password verification on th
FastGPT versions 4.14.8.3 and below contain a critical arbitrary code execution vulnerability in the fastgpt-preview-ima
Authentication bypass in FastGPT 4.15.0-beta4 lets unauthenticated remote attackers forge JWTs and access internal plugi
Cross-tenant file disclosure in FastGPT prior to v4.15.0-beta5 allows an attacker to read another team's stored files by
Server-side request forgery in FastGPT before 4.15.0-beta4 lets an authenticated team member abuse the HTTP-tool OpenAPI
Server-Side Request Forgery in Labring FastGPT prior to 4.15.0-beta1 lets an authenticated attacker bypass the platform'
Server-side request forgery in FastGPT (labring) versions 4.14.11 and prior lets a low-privileged user coerce the server
Same weakness CWE-862 – Missing Authorization
View allSame technique Authentication Bypass
View allShare
External POC / Exploit Code
Leaving vuln.today