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Back to active CVEs
Medium · CVSS 6.5CVE-2026-85621

LobeChat 2.2.1 Webhook Signature Verification Bypass QQ FeishuCVE-2026-85621

Answer in brief

CVE-2026-85621 records a Medium severity (CVSS 6.5) vulnerability in LobeChat 2.2.1 Webhook Signature Verification Bypass QQ Feishu. The current sources do not mark it as known exploited. The current feed maps lobehub/lobehub (generic), lobehub/lobehub (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 4, 2026Updated Sep 24, 2026Source checked Oct 25, 2026First seen by HOL Sep 4, 2026Material review Sep 24, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 6.5
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 6.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps lobehub/lobehub (generic), lobehub/lobehub (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
lobehub/lobehubgeneric0Not reported
lobehub/lobehubgeneric>=0 <=2.2.15Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for lobehub/lobehub, lobehub/lobehub.
  2. 2Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

  1. Published upstream

    Sep 4, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 24, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Sep 4, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • Source referencevulncheck.com
Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Forged signed tokens let any registered user take over other users and organizationsAlso CWE-345

Record context

Vulnerability class
Missing Auth
EPSS
Not reported
CWE IDs
CWE-345
Source
CVE List V5
Source checked
Oct 25, 2026
References
5 linked sources
Open source record