{"affected":[{"defaultStatus":"unaffected","ecosystem":"github","packageName":"coopcycle/coopcycle-web","product":"coopcycle-web","source":"CNA: VulnCheck","vendor":"CoopCycle","versions":[{"lessThan":"6.20.0","status":"affected","version":"5.6.0","versionType":"semver"}]}],"cveId":"CVE-2026-121620","cwes":["CWE-345"],"description":"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.","epss":null,"exploits":[],"kev":null,"metrics":[{"score":8.3,"severity":"high","source":"CNA: VulnCheck","vector":"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","version":"4.0"},{"score":6.5,"severity":"medium","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L","version":"3.1"}],"modifiedAt":1793795934345,"publishedAt":1793795934345,"references":[{"source":"CNA: VulnCheck","tags":["patch"],"url":"https://github.com/coopcycle/coopcycle-web/commit/9b499950d433ca8ba894996d6b17f49885ca9485"},{"source":"CNA: VulnCheck","tags":["release-notes"],"url":"https://github.com/coopcycle/coopcycle-web/releases/tag/v6.20.0"},{"source":"CNA: VulnCheck","tags":["technical-description"],"url":"https://github.com/coopcycle/coopcycle-web/blob/v6.19.1/config/packages/security.yaml#L328-L330"},{"source":"CNA: VulnCheck","tags":["technical-description"],"url":"https://github.com/coopcycle/coopcycle-web/blob/v6.19.1/src/Integration/Zelty/ZeltyCatalogProcessor.php#L51-L57"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/coopcycle-coopcycle-web-5.6.0-before-6.20.0-missing-zelty-webhook-signature-verification"}],"remediation":[{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/coopcycle/coopcycle-web/commit/9b499950d433ca8ba894996d6b17f49885ca9485"}],"revision":"3c2f2a85c245348d48a5d4b0d73eb3ca520e122d0760b845ec95d701a8b21487","sources":[{"modifiedAt":1793795934345,"name":"CNA: VulnCheck","retrievedAt":1793797789557,"url":"https://www.cve.org/CVERecord?id=CVE-2026-121620"}],"ssvc":null,"status":"published","title":"CoopCycle coopcycle-web 5.6.0 before 6.20.0 Missing Zelty Webhook Signature Verification","updatedAt":1793797789557}