CVE-2026-121620 (GCVE-0-2026-121620)

Vulnerability from cvelistv5 – Published: 2026-11-04 12:38 – Updated: 2026-11-04 18:48
VLAI
Title
CoopCycle coopcycle-web 5.6.0 before 6.20.0 Missing Zelty Webhook Signature Verification
Summary
CoopCycle coopcycle-web 5.6.0 before 6.20.0 contains a missing authentication vulnerability that allows unauthenticated attackers to forge Zelty webhook events because the x-zelty-hmac-sha256 HMAC signature is never verified. Attackers can POST forged dish, menu, option and order-status events to /api/zelty/webhook/* endpoints to toggle restaurant products and alter order preparation states.
Severity
8.3 (High)
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N
6.5 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-04 18:48 UTC
CWE
  • CWE-345 - Insufficient Verification of Data Authenticity
Assigner
VulnCheck CNA
References
Impacted products
Vendor Product Version
CoopCycle coopcycle-web Affected: 5.6.0 , < 6.20.0 (semver)
Create a notification for this product.
Date Public
2026-11-03 14:28
Credits
Florian Kabashi
Show details on NVD website
To clipboard 

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