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Gitea before 1.23.0 allows attackers to add attachments with forbidden file extensions by editing an attachment name via an attachment API.
Use CWE-424, Gitea vendor hub and Gitea product page to widen CVE-2025-68939 into its surrounding weakness, vendor, and product context.
Compare it with CVE-2026-20912, CVE-2026-20897 and CVE-2026-20750 for nearby disclosures in the same product family.