{"schema":"threatline.record/2","record":{"id":"CVE-2026-115374","aliases":["GHSA-mmj7-8rgf-mx2h"],"summary":"Incus 7.0.0 before 7.0.2 and 7.1.0 before 7.5.0 Unsigned Header Bypass in Presigned S3 Upload URLs","details":"Incus 7.0.0 before 7.0.2 and 7.1.0 before 7.5.0 contains a signature verification flaw in its built-in S3 server that allows presigned URL holders to inject unsigned x-amz-* headers. Attackers can add an unsigned X-Amz-Copy-Source header to a presigned upload URL to copy other bucket objects onto the granted key, disclosing their contents and ETags.","categories":["Unclassified"],"product":"incus","vendor":"lxc","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-115374","source_modified_at":"2026-10-23T15:01:34.195Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"incus","vendor":"lxc","versions":[{"version":"7.0.0","status":"affected","versionType":"semver","lessThan":"7.0.2"},{"version":"7.0.2","status":"unaffected","versionType":"semver"},{"version":"7.1.0","status":"affected","versionType":"semver","lessThan":"7.5.0"},{"version":"7.5.0","status":"unaffected","versionType":"semver"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-115374","source_modified_at":"2026-10-23T15:01:34.195Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"incus","ecosystem":null},"version":"7.0.2","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-115374","source_modified_at":"2026-10-23T15:01:34.195Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"incus","ecosystem":null},"version":"7.5.0","basis":"first unaffected version stated in the CVE record"}],"cvss":7.1,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00153,"percentile":0.04086,"score_date":"2026-10-23"},"published_at":"2026-10-22T19:13:43.999Z","modified_at":"2026-10-23T15:01:34.195Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-115374","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23T15:01:34.195Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-115374","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/lxc/incus/security/advisories/GHSA-mmj7-8rgf-mx2h","tags":["vendor-advisory"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/incus-7.0.0-before-7.0.2-and-7.1.0-before-7.5.0-unsigned-header-bypass-in-presigned-s3-upload-urls","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"partial","assessed_at":"2026-10-23T14:48:25.416342Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-23T15:01:34.195Z","content_hash":"f04c23cf3d773cd24a2141cdbeed1866177594b75e193476dcc90bee246ccb07"}}