CVE-2026-118763

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{"affected": [{"affectedData": [{"product": "sigstore-js", "vendor": "sigstore", "versions": [{"status": "affected", "version": "< 0.7.2"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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 and receive the registry bearer token, Basic credentials, or custom authentication headers. Redirect-time header stripping does not prevent the leak because the cross-host PUT is a new explicit request rather than a followed redirect. This is a residual of CVE-2026-59891, whose fix changed credential selection in credentials.ts but did not constrain where credentials are sent from registry.ts. Version 0.7.2 fixes the issue by separating registry credentials from client-wide defaults and sending them only to the registry origin."}], "id": "CVE-2026-118763", "lastModified": "2026-10-30T19:39:14.897", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.4, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 4.0, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-118763", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-30T15:20:32.038162Z", "version": "2.0.3"}}]}, "published": "2026-10-29T17:18:07.230", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/sigstore/sigstore-js/commit/b855f46cfe81f26481c6d3f4b333dfd00f2fd1b1"}, {"source": "security-advisories@github.com", "url": "https://github.com/sigstore/sigstore-js/commit/e4ca65c3ab3c675456ab9b0bd04217ceccad3558"}, {"source": "security-advisories@github.com", "url": "https://github.com/sigstore/sigstore-js/pull/1762"}, {"source": "security-advisories@github.com", "url": "https://github.com/sigstore/sigstore-js/releases/tag/@sigstore/oci@0.7.2"}, {"source": "security-advisories@github.com", "url": "https://github.com/sigstore/sigstore-js/security/advisories/GHSA-j63v-mwhm-56jx"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-522"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{"bugzilla": {"description": "@sigstore/oci: @sigstore/oci: credential disclosure via unvalidated upload location", "id": "2563618", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2563618"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N", "status": "draft"}, "cwe": "CWE-201", "details": ["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 and receive the registry bearer token, Basic credentials, or custom authentication headers. Redirect-time header stripping does not prevent the leak because the cross-host PUT is a new explicit request rather than a followed redirect. This is a residual of CVE-2026-59891, whose fix changed credential selection in credentials.ts but did not constrain where credentials are sent from registry.ts. Version 0.7.2 fixes the issue by separating registry credentials from client-wide defaults and sending them only to the registry origin.", "A flaw was found in @sigstore/oci. This vulnerability allows a malicious or compromised container registry to cause an information disclosure of sensitive authentication credentials. When pushing an artifact, the client sends an upload request to a registry-provided destination address without verifying that the host matches the trusted registry origin. As a result, client authentication headers and registry tokens are transmitted to an attacker-controlled server."], "name": "CVE-2026-118763", "public_date": "2026-10-29T17:01:40Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-118763\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-118763\nhttps://github.com/sigstore/sigstore-js/commit/b855f46cfe81f26481c6d3f4b333dfd00f2fd1b1\nhttps://github.com/sigstore/sigstore-js/commit/e4ca65c3ab3c675456ab9b0bd04217ceccad3558\nhttps://github.com/sigstore/sigstore-js/pull/1762\nhttps://github.com/sigstore/sigstore-js/releases/tag/@sigstore/oci@0.7.2\nhttps://github.com/sigstore/sigstore-js/security/advisories/GHSA-j63v-mwhm-56jx"], "statement": "This vulnerability is rated as Moderate severity because credential exposure requires active user interaction and an intentional connection to an untrusted or compromised container registry. In typical Red Hat environments, artifact signing and publishing pipelines are configured to interact exclusively with known, enterprise-managed registries rather than arbitrary external endpoints. Consequently, an attacker cannot trigger this credential leakage remotely or passively without first compromising the target registry infrastructure or convincing an operator to publish to a rogue registry.", "threat_severity": "Moderate"}

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