{"id":"CVE-2026-70658","title":"Pay is a payments engine for Ruby on Rails 6.0 and higher","summary":"Pay is a payments engine for Ruby on Rails 6.0 and higher. Prior to 11.6.2, Pay::Webhooks::PaddleBillingController#valid_signature? in app/controllers/pay/webhooks/paddle_billing_controller.rb compares the computed 64-character SHA-256 H…","severity":"high","cvss":7.4,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","cwe":["CWE-208"],"vendor":"pay-rails","product":"pay","affected":["pay < 11.6.2"],"published":"2026-09-14","updated":"2026-09-14","sourceUpdated":"2026-09-14T19:17:40.293","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-70658","references":[{"url":"https://github.com/pay-rails/pay/commit/ba6494109d88209fba2a4df2d9d6373fe81ed805","label":"security-advisories@github.com"},{"url":"https://github.com/pay-rails/pay/releases/tag/v11.6.2","label":"security-advisories@github.com"},{"url":"https://github.com/pay-rails/pay/security/advisories/GHSA-mjgf-xj26-9qf9","label":"security-advisories@github.com"},{"url":"https://github.com/pay-rails/pay/security/advisories/GHSA-mjgf-xj26-9qf9","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"total","timestamp":"2026-09-14T18:57:23.905589Z"},"ingestedAt":"2026-09-14T18:12:17.318Z","epss":0.00501,"epssPercentile":0.41768,"slug":"CVE-2026-70658","body":"## Overview\n\nPay is a payments engine for Ruby on Rails 6.0 and higher. Prior to 11.6.2, Pay::Webhooks::PaddleBillingController#valid_signature? in app/controllers/pay/webhooks/paddle_billing_controller.rb compares the computed 64-character SHA-256 HMAC with the attacker-controlled h1 token from the Paddle-Signature header using Ruby String#==. An unauthenticated remote attacker who can repeatedly submit requests to /pay/webhooks/paddle_billing and obtain sufficiently precise timing measurements can infer matching digest prefixes and recover a valid signature. A forged accepted webhook is enqueued through Pay::Webhooks::ProcessJob and can cause a host application to update billing state, provision paid features, record refunds, or trigger customer notifications. This issue is fixed in version 11.6.2.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":53,"depthScoreParts":{"impact":40.7,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":203156,"id":"CVE-2026-70658","ts":1789413238488,"field":"exploit_available","old":"false","new":"true"}]}