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TI-2026-58746 Aliases CVE-2026-85621GHSA-627w-x4jq-g83v

LobeChat 2.2.1 Webhook Signature Verification Bypass QQ Feishu

Priority HIGH 70CWE-345Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-345.

Summary

LobeChat (LobeHub) 2.2.1 does not properly verify inbound chat-platform webhook signatures in the QQ and Feishu adapters. The webhook route (/api/agent/webhooks/:platform) is unauthenticated by design and delegates verification to each adapter; the QQ adapter performs no Ed25519 signature verification on dispatched message events, and the Feishu adapter only performs an optional static-token comparison that is skipped when no token is configured (the default) and is not a body signature. An unauthenticated attacker who knows the public webhook URL can POST forged inbound messages with an attacker-chosen sender identity and arbitrary text, causing the bot owner's agent to process attacker-controlled input and treat the attacker as a trusted platform sender.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00201 10th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
lobehublobehubup to 2.2.15—No fix listedCNA
  • lobehub Vendorlobehub Affected up to 2.2.15 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-85621
  2. 2026-10-03 Alias added: GHSA-627w-x4jq-g83v

References

Other 4

  • TI-2026-39067 LobeHub: Unauthenticated SSRF in `/webapi/proxy` CVSS 3.1CRITICAL 9.0
  • TI-2026-83681 Path traversal in LobeHub Chat lets users write arbitrary files CVSS 4.0HIGH 8.7
  • TI-2024-31448 Lobe Chat has insufficient fix for GHSA-mxhq-xw3g-rphc (CVE-2024-32964) CVSS 3.1CRITICAL 9.0
  • TI-2024-21831 lobe-chat `/api/proxy` endpoint Server-Side Request Forgery vulnerability CVSS 3.1CRITICAL 9.0
  • TI-2024-21832 ssrf vulnerability in lobe-chat CVSS 3.1HIGH 8.6
  • TI-2026-42275 LobeChat < 2.2.10-canary.18 - SSRF via importFromUrl and fetchImageFromUrl CVSS 4.0HIGH 8.3
See all 21 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences