{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-58426: Gitea Actions Artifacts V4 signed URL HMAC ambiguity allows cross-repository artifact read and cross-task upload-state write","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-58426","status":"final","version":"1","initial_release_date":"2026-07-03T20:54:53.283Z","current_release_date":"2026-07-03T20:54:53.283Z","revision_history":[{"date":"2026-07-03T20:54:53.283Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"Gitea Actions Artifacts V4 signed URL HMAC ambiguity allows cross-repository artifact read and cross-task upload-state write","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-58426 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-58426"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-58426"},{"category":"external","summary":"GitHub Security Advisory","url":"https://github.com/go-gitea/gitea/security/advisories/GHSA-hg5r-vq93-9fv6"},{"category":"external","summary":"GitHub Pull Request #37707","url":"https://github.com/go-gitea/gitea/pull/37707"},{"category":"external","summary":"Gitea v1.26.2 Release","url":"https://github.com/go-gitea/gitea/releases/tag/v1.26.2"},{"category":"external","summary":"Gitea v1.26.2 Release Blog Post","url":"https://blog.gitea.com/release-of-1.26.2/"}]},"product_tree":{"branches":[{"category":"vendor","name":"Gitea","branches":[{"category":"product_name","name":"Gitea Open Source Git Server","branches":[{"category":"product_version_range","name":">=1.22.0 <=1.26.1","product":{"name":"Gitea Gitea Open Source Git Server >=1.22.0 <=1.26.1","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:gitea:gitea_open_source_git_server:*:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-58426","title":"Gitea Actions Artifacts V4 signed URL HMAC ambiguity allows cross-repository artifact read and cross-task upload-state write","notes":[{"category":"description","text":"Gitea Actions Artifacts V4 signed URL HMAC ambiguity allows cross-repository artifact read and cross-task upload-state write","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1"]},"scores":[{"cvss_v3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N","baseScore":9.6,"baseSeverity":"CRITICAL"},"products":["CSAFPID-1"]}],"remediations":[{"category":"none_available","details":"No fixed version is published yet. Monitor the upstream advisory.","product_ids":["CSAFPID-1"]}]}]}