{"id":"CVE-2026-91772","summary":"Halo through 2.26.1 Open Redirect via Unvalidated URI Parameter","details":"Halo through 2.26.1 contains an open redirect vulnerability in the anonymous thumbnail endpoint that fails to validate the uri query parameter. Attackers can craft malicious links on the trusted Halo domain that redirect visitors to arbitrary external sites, enabling phishing attacks and abuse of redirect-based trust relationships.","modified":"2026-09-17T03:47:21.694787464Z","published":"2026-09-15T01:20:33.781Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-601"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/91xxx/CVE-2026-91772.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/91xxx/CVE-2026-91772.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-91772"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/halo-through-2.26.1-open-redirect-via-unvalidated-uri-parameter"},{"type":"REPORT","url":"https://github.com/halo-dev/halo/issues/10247"},{"type":"PACKAGE","url":"https://github.com/halo-dev/halo"},{"type":"ARTICLE","url":"https://github.com/halo-dev/halo/blob/v2.26.1/application/src/main/java/run/halo/app/core/endpoint/theme/ThumbnailEndpoint.java#L76-L98"},{"type":"ARTICLE","url":"https://github.com/halo-dev/halo/blob/v2.26.1/application/src/main/resources/extensions/role-template-anonymous.yaml#L53-L55"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/halo-dev/halo","events":[{"introduced":"0"},{"fixed":"88c2ef14355c79a4dbd1d5c3246b3ea32836e06b"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"last_affected":"2.26.1"},{"fixed":"2.26.1"}],"source":["AFFECTED_FIELD","DESCRIPTION"]}}],"versions":["v2.26.0","v2.26.0-beta.3","v2.26.0-beta.2","v2.26.0-beta.1","v2.25.4","v2.25.3","v2.25.2","v2.25.1","v2.25.0","v2.25.0-beta.2","v2.25.0-beta.1","v2.24.2","v2.24.1","v2.24.0","v2.23.2","v2.23.1","v2.23.0","v2.23.0-beta.2","v2.23.0-beta.1","v2.22.11","v2.22.10","v2.22.9","v2.22.8","v2.22.7","v2.22.6","v2.22.5","v2.22.4","v2.22.3","v2.22.2","v2.22.1","v2.22.0","v2.22.0-rc.1","v2.22.0-alpha.4","v2.22.0-alpha.3","v2.22.0-alpha.2","v2.22.0-alpha.1","v2.21.9","v2.21.8","v2.21.7","v2.21.6","v2.21.5","v2.21.4","v2.21.3","v2.21.2","v2.21.1","v2.21.0","v2.21.0-beta.2","v2.21.0-beta.1","v2.21.0-alpha.2","v2.21.0-alpha.1","v2.20.21","v2.20.20","v2.20.19","v2.20.18","v2.20.17","v2.20.16","v2.20.15","v2.20.14","v2.20.13","v2.20.12","v2.20.11","v2.20.10","v2.20.9","v2.20.8","v2.20.7","v2.20.6","v2.20.5","v2.20.4","v2.20.3","v2.20.2","v2.20.1","v2.20.0","v2.20.0-rc.2","v2.20.0-rc.1","v2.19.0","v2.19.0-rc.4","v2.19.0-rc.3","v2.19.0-rc.2","v2.19.0-rc.1","v2.18.0","v2.18.0-rc.1","v2.17.0","v2.17.0-rc.1","v2.17.0-beta.1","v2.17.0-alpha.2","v2.17.0-alpha.1","v2.16.0","v2.16.0-rc.2","v2.16.0-rc.1","v2.15.0","v2.15.0-rc.1","v2.14.0","v2.14.0-rc.1","v2.13.0","v2.13.0-rc.1","v2.12.3","v2.12.0-rc.2","v2.12.0","v2.12.0-rc.1","v2.12.0-beta.2","v2.12.0-beta.1","v2.12.0-alpha.2","v2.12.0-alpha.1","v2.11.0","v2.11.0-rc.2","v2.11.0-rc.1","v2.10.0","v2.10.0-beta.1","v2.10.0-alpha.1","v2.9.0","v2.9.0-rc.1","v2.8.0","v2.8.0-rc.2","v2.8.0-rc.1","v2.7.0","v2.7.0-rc.2","v2.7.0-rc.1","v2.6.0","v2.6.0-rc.1","v2.5.1","v2.5.0","v2.5.0-rc.2","v2.5.0-rc.1","v2.4.0","v2.4.0-rc.1","v2.3.0","v2.3.0-rc.1","v2.2.0","v2.1.0","v2.1.0-rc.1","v2.0.0","v2.0.0-rc.2","v2.0.0-rc.1","v2.0.0-beta.2","v2.0.0-beta.1","v2.0.0-alpha.4","v2.0.0-alpha.3","v2.0.0-alpha.2","v2.0.0-alpha.1","v1.5.0-alpha.1","v1.4.13","v1.4.12","v1.4.11","v1.4.9","v1.4.8","v1.4.7","v1.4.7-beta.1","v1.4.6","v1.4.5","v1.4.4","v1.4.3","v1.4.3-beta.3","v1.4.3-beta.2","v1.4.3-beta.1","v1.4.2","v1.4.1","v1.4.0","v1.4.0-beta.3","v1.4.0-beta.2","v1.4.0-beta.1","v1.3.2","v1.3.1","v1.3.0","v1.3.0-beta.4","v1.3.0-beta.3","v1.3.0-beta.2","v1.3.0-beta.1","v1.2.0","v1.1.1","v1.1.0","v1.0.3","v1.0.2","v1.0.1","v1.0.0","v0.4.1","v0.4.0","v0.3.0","v0.2.1","v0.2.0","v0.1.1","v0.1","v0.0.9","v0.0.8","v0.0.7","v0.0.6","v0.0.5","v0.0.4","v0.0.3","v0.0.2","v0.0.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-91772.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N"}]}