{"id":"CVE-2026-0637","aliases":["EUVD-2026-53820","GHSA-q9jj-jm6w-fpgf"],"status":"published","title":"Header Injection via Custom URL Configuration in Multiple WSO2 Products Allows Open Redirect and Log Forgery","description":"When a proxy server is configured with `customUrl.enabled`, the component accepts user-supplied input within forwarded HTTP headers without enforcing expected validation constraints. A malicious actor can manipulate these headers to influence the URL construction process, leading to an open redirect vulnerability. Additionally, unsanitized header values are written to application logs.\n\nAn attacker can exploit this to force redirection to arbitrary malicious domains, potentially enabling phishing attacks. Furthermore, they can inject forged entries into application logs, impacting the reliability of security logs and potentially hindering incident investigation.","severity":{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00194,"percentile":0.09099,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-20","CWE-532","CWE-74"],"published":"2026-08-06T07:33:20Z","modified":"2026-11-04T15:33:04Z","products":[{"vendor":"wso2","product":"api_control_plane"},{"vendor":"wso2","product":"api_manager"},{"vendor":"wso2","product":"identity_server"},{"vendor":"wso2","product":"identity_server_as_key_manager"},{"vendor":"wso2","product":"open_banking_am"},{"vendor":"wso2","product":"open_banking_iam"},{"vendor":"wso2","product":"traffic_manager"},{"vendor":"wso2","product":"universal_gateway"},{"vendor":"wso2","product":"wso2 api control plane"},{"vendor":"wso2","product":"wso2 api manager"}],"references":[{"url":"https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4829/","tags":["vendor-advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-0637"},{"url":"https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4897"},{"url":"https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2025-4829"},{"url":"https://github.com/advisories/GHSA-q9jj-jm6w-fpgf"}],"sources":{"cve":[{"id":"CVE-2026-0637","title":"Header Injection via Custom URL Configuration in Multiple WSO2 Products Allows Open Redirect and Log Forgery","description":"When a proxy server is configured with `customUrl.enabled`, the component accepts user-supplied input within forwarded HTTP headers without enforcing expected validation constraints. A malicious actor can manipulate these headers to influence the URL construction process, leading to an open redirect vulnerability. Additionally, unsanitized header values are written to application logs.\n\nAn attacker can exploit this to force redirection to arbitrary malicious domains, potentially enabling phishing attacks. Furthermore, they can inject forged entries into application logs, impacting the reliability of security logs and potentially hindering incident investigation.","status":"published","published":"2026-08-06T07:33:20.334Z","modified":"2026-11-04T13:47:20.802Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-20","CWE-74"],"updated_at":"2026-11-04T14:31:12.473889Z"}],"euvd":[{"id":"EUVD-2026-53820","description":"When a proxy server is configured with `customUrl.enabled`, the component accepts user-supplied input within forwarded HTTP headers without enforcing expected validation constraints. A malicious actor can manipulate these headers to influence the URL construction process, leading to an open redirect vulnerability. Additionally, unsanitized header values are written to application logs.\n\nAn attacker can exploit this to force redirection to arbitrary malicious domains, potentially enabling phishing attacks. Furthermore, they can inject forged entries into application logs, impacting the reliability of security logs and potentially hindering incident investigation.","status":"published","published":"2026-08-06T07:33:20Z","modified":"2026-11-04T13:47:20Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-04T15:09:08.966365Z"}],"ghsa":[{"id":"GHSA-q9jj-jm6w-fpgf","title":"When an Event Publisher output adapter is configured with irrelevant properties, the affected...","description":"When an Event Publisher output adapter is configured with irrelevant properties, the affected products log these properties. This logging occurs without sufficient validation or sanitization of the property values.\n\nA malicious actor with access to the 'wso2carbon' log files could retrieve sensitive information, such as user credentials or other confidential data, that was inadvertently logged due to misconfiguration, potentially leading to unauthorized access.","status":"published","published":"2026-08-06T09:30:31Z","modified":"2026-11-04T15:33:04Z","cvss":[{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-20","CWE-532"],"updated_at":"2026-11-04T15:52:09.418756Z"}],"nvd":[{"id":"CVE-2026-0637","description":"When a proxy server is configured with `customUrl.enabled`, the component accepts user-supplied input within forwarded HTTP headers without enforcing expected validation constraints. A malicious actor can manipulate these headers to influence the URL construction process, leading to an open redirect vulnerability. Additionally, unsanitized header values are written to application logs.\n\nAn attacker can exploit this to force redirection to arbitrary malicious domains, potentially enabling phishing attacks. Furthermore, they can inject forged entries into application logs, impacting the reliability of security logs and potentially hindering incident investigation.","status":"published","published":"2026-08-06T08:16:29.453Z","modified":"2026-11-04T14:17:10.823Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-20","CWE-74"],"updated_at":"2026-11-04T16:04:00.893775Z"}]}}