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vuln-cve/data/2026/49xxx/CVE-2026-49478.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-49478",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"state": "PUBLISHED",
"assignerShortName": "GitHub_M",
"dateReserved": "2026-05-30T04:17:43.095Z",
"datePublished": "2026-08-13T13:08:21.498Z",
"dateUpdated": "2026-08-15T03:14:47.189Z"
},
"containers": {
"cna": {
"title": "Fulcio has OIDC Discovery Redirect Following Allows SSRF and JWKS Substitution for Meta-Issuer Paths, with Kubernetes Service-Account Token Leakage",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-918",
"lang": "en",
"description": "CWE-918: Server-Side Request Forgery (SSRF)",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 8.7,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N",
"version": "3.1"
}
}
],
"references": [
{
"name": "https://github.com/sigstore/fulcio/security/advisories/GHSA-f5mr-q85p-6hh6",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/sigstore/fulcio/security/advisories/GHSA-f5mr-q85p-6hh6"
},
{
"name": "https://github.com/sigstore/fulcio/pull/2354",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/sigstore/fulcio/pull/2354"
},
{
"name": "https://github.com/sigstore/fulcio/commit/378c654f48c3bafdced04ead7010aab2cb4c6ca1",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/sigstore/fulcio/commit/378c654f48c3bafdced04ead7010aab2cb4c6ca1"
},
{
"name": "https://github.com/sigstore/fulcio/releases/tag/v1.8.6",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/sigstore/fulcio/releases/tag/v1.8.6"
}
],
"affected": [
{
"vendor": "sigstore",
"product": "fulcio",
"versions": [
{
"version": "< 1.8.6",
"status": "affected"
}
]
}
],
"providerMetadata": {
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M",
"dateUpdated": "2026-08-13T13:08:21.498Z"
},
"descriptions": [
{
"lang": "en",
"value": "Fulcio is a certificate authority for issuing code signing certificates for an OpenID Connect (OIDC) identity. Versions through 1.8.5 improperly follow cross-host redirects and attach Kubernetes ServiceAccount tokens during OIDC discovery, allowing a malicious or compromised issuer to perform blind SSRF, substitute and cache malicious JWKS keys, or disclose ServiceAccount tokens to external hosts. Version 1.8.6 blocks cross-host redirects, restricts token injection, and restricts local token loading. No known workarounds are available."
}
],
"source": {
"advisory": "GHSA-f5mr-q85p-6hh6",
"discovery": "UNKNOWN"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-08-15T03:14:38.396830Z",
"id": "CVE-2026-49478",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-08-15T03:14:47.189Z"
}
}
]
}
}