{"id":"EM-20261030-5DEH","url":"https://cyber.eventmonitor.net/incident/EM-20261030-5DEH/","type":"cve","title":"sigstore-js Vulnerability (CVE-2026-118763)","subtitle":"CVE-2026-118763","subject":"CVE-2026-118763","status":"Developing","severity":"high","affected":[],"headline":null,"born":"2026-10-30T23:00:17.000Z","firstSignal":"2026-10-29T17:18:07.230Z","lastSignal":"2026-10-30T23:00:17.000Z","updated":"2026-11-04T14:43:58.877Z","revision":1,"life":[{"status":"Born","at":"2026-10-30T23:00:17.000Z","why":"second independent source: C26 GitHub Advisory Database"},{"status":"Developing","at":"2026-10-30T23:00:17.000Z","why":"signals keep joining"}],"changeLog":[{"at":"2026-10-29T17:18:07.230Z","what":"First signal: C6 NVD CVE API 2.0"},{"at":"2026-10-30T23:00:17.000Z","what":"Born: second source, C26 GitHub Advisory Database. Page EM-20261030-5DEH created."}],"stages":[{"name":"Disclosed","at":"2026-10-29T17:18:07.230Z","detail":"C6 NVD published"},{"name":"Scored","at":"2026-10-29T17:18:07.230Z","detail":"CVSS 7.4 · EPSS 0.3%"},{"name":"Exploited","at":null,"detail":"No exploitation reported"},{"name":"Advisories","at":null,"detail":"None yet"},{"name":"Vendor Response","at":null,"detail":"None in sources yet"},{"name":"Resolved","at":null,"detail":"After 14 quiet days"}],"signals":[{"at":"2026-10-29T17:18:07.230Z","source":"C6","sourceName":"NVD CVE API 2.0","role":"Database","severity":3,"title":"CVE-2026-118763 (CVSS 7.4)","text":"sigstore-js provides JavaScript libraries for interacting with Sigstore services. Prior to 0.7.2, packages/oci/src/registry.ts contains a RegistryClient.signIn() method that stores registry Authorization and Docker configuration headers as defaults on a shared HTTP client, while RegistryClient.uploadBlob() sends a fresh PUT to an absolute blob-upload Location supplied by the registry without checking that its origin or scheme matches the registry. A malicious or compromised registry can therefore direct a user pushing an artifact through attachArtifactToImage() to an attacker-controlled host a","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118763"},{"at":"2026-10-30T23:00:17.000Z","source":"C26","sourceName":"GitHub Advisory Database","role":"Database","severity":3,"title":"GHSA-j63v-mwhm-56jx / CVE-2026-118763: @sigstore/oci sends the registry Authorization header to a cross-host blob-upload Location","text":"npm:@sigstore/oci","url":"https://github.com/advisories/GHSA-j63v-mwhm-56jx"}],"crowd":[],"reference":{"nvd":{"published":"2026-10-29T17:18:07.230","score":7.4,"severity":"HIGH","desc":"sigstore-js provides JavaScript libraries for interacting with Sigstore services. Prior to 0.7.2, packages/oci/src/registry.ts contains a RegistryClient.signIn() method that stores registry Authorization and Docker configuration headers as defaults on a shared HTTP client, while RegistryClient.uploa","product":"","seen":1793803438877},"kev":null,"epss":{"epss":0.003,"pct":0.2283,"at":1793803438877},"p0":false},"mergedInto":null,"publisher":"Event Monitor Cyber"}