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.
CVE-2026-68929
This critical-severity CVE scores 9.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 83% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
- High severity, but no confirmed exploitation yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 9.3
- EG Score
- 9.3(medium)
- EG Risk
- 73(Attend)EG Risk 73/100SSVC: Attend
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity93% × 45%Exploitation40% × 40%Automatability100% × 15%Action: Remediate soon — notable exploitation risk. - EPSS PROB
- 0%
- EPSS %ILE
- 17%
- KEV
- Not listed
Published
August 27, 2026
Last Modified
August 28, 2026
Advisory Details (2)
Auto-updated Aug 29, 2026Missing authorization on WeChat (iLink) outLink endpoints: unauthenticated cross-tenant bot-token wipe (DoS) and channel hijack keyed only by the public shareId · Advisory · labring/FastGPT · GitHub
https://github.com/labring/FastGPT/security/advisories/GHSA-q4pr-3qpg-9q5vcommit 81d391995b1f (labring/FastGPT)
Patch available: labring/FastGPT v4.15.2 (contains commit 81d391995b1f)
https://github.com/labring/FastGPT/commit/81d391995b1f9989455267448872ff88bb1f42c9Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 9× in last 7d / 9× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-08-30 03:02 UTCEG score recompute
- 2026-08-30 01:22 UTCEPSS rescore
- 2026-08-29 00:27 UTCEG score recompute
- 2026-08-28 21:42 UTCEPSS rescore
- 2026-08-28 20:40 UTCEG score recompute
- 2026-08-28 19:46 UTCEG score recompute
- 2026-08-28 00:31 UTCEG score recompute
- 2026-08-27 23:24 UTCEG score recompute
- 2026-08-27 23:23 UTCMITRE cvelistV5first tracked
Frequently asked(5)
What is CVE-2026-68929?
When was CVE-2026-68929 disclosed?
Is CVE-2026-68929 actively exploited?
What is the CVSS score of CVE-2026-68929?
How do I remediate CVE-2026-68929?
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-68929
Is Your Infrastructure Affected by CVE-2026-68929?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.