{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-27708: FOSSBilling: IDOR in Servicecustom Client API allows cross-client data access","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-27708","status":"final","version":"1","initial_release_date":"2026-06-24T19:24:50.417Z","current_release_date":"2026-06-24T19:24:50.417Z","revision_history":[{"date":"2026-06-24T19:24:50.417Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"FOSSBilling is a free, open-source billing and client management system. In versions 0.7.2 and prior, the Servicecustom Client API's __call method accepts an order_id parameter and fetches the associated order without verifying the authenticated client owns it, potentially exposing cross-client data through IDOR. An authenticated client can access any other client's custom service by guessing sequential order IDs. This can lead to a confidentiality breach — attackers can read client PII (name, email, phone, address, company details, VAT number) and service configuration data belonging to other clients. This issue has been fixed in version 0.8.0.","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-27708 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-27708"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-27708"},{"category":"external","summary":"https://github.com/FOSSBilling/FOSSBilling/security/advisories/GHSA-p36w-9x66-488j","url":"https://github.com/FOSSBilling/FOSSBilling/security/advisories/GHSA-p36w-9x66-488j"},{"category":"external","summary":"https://github.com/FOSSBilling/FOSSBilling/releases/tag/0.8.0","url":"https://github.com/FOSSBilling/FOSSBilling/releases/tag/0.8.0"}]},"product_tree":{"branches":[{"category":"vendor","name":"FOSSBilling","branches":[{"category":"product_name","name":"FOSSBilling","branches":[{"category":"product_version","name":"< 0.8.0","product":{"name":"FOSSBilling FOSSBilling < 0.8.0","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:fossbilling:fossbilling:\\<_0.8.0:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-27708","title":"FOSSBilling: IDOR in Servicecustom Client API allows cross-client data access","notes":[{"category":"description","text":"FOSSBilling is a free, open-source billing and client management system. In versions 0.7.2 and prior, the Servicecustom Client API's __call method accepts an order_id parameter and fetches the associated order without verifying the authenticated client owns it, potentially exposing cross-client data through IDOR. An authenticated client can access any other client's custom service by guessing sequential order IDs. This can lead to a confidentiality breach — attackers can read client PII (name, email, phone, address, company details, VAT number) and service configuration data belonging to other clients. This issue has been fixed in version 0.8.0.","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1"]},"scores":[{"cvss_v4":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","baseScore":7.1,"baseSeverity":"HIGH"},"products":["CSAFPID-1"]}],"remediations":[{"category":"none_available","details":"No fixed version is published yet. Monitor the upstream advisory.","product_ids":["CSAFPID-1"]}]}]}