CVE-2026-64643 (GCVE-0-2026-64643)
Vulnerability from cvelistv5
Published
2026-07-27 17:48
Modified
2026-07-27 18:21
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-201 - Insertion of Sensitive Information Into Sent Data
Summary
Next.js is a React framework for building full-stack web applications. In versions 12.0.0 through 15.5.20 and 16.0.0 through 16.2.10, Next.js applications using App Router, Server Actions (use server) or use cache endpoints can be disclosed bypassing any authentication on the pages where these endpoints are usually used. Server Action IDs can be disclosed to unauthenticated users via publicly served client artifacts (for example, static chunks containing action references). Affected users are applications using App Router and Server Actions. By itself, this disclosure is typically a recon/enumeration primitive; however, it can increase risk when combined with other weaknesses. This issue has been fixed in versions 15.5.21 and 16.2.11.
References
| URL | Tags | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||
Impacted products
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-64643",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-27T18:20:57.639287Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-07-27T18:21:55.549Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "next.js",
"vendor": "vercel",
"versions": [
{
"status": "affected",
"version": "\u003e= 13.0.0, \u003c 15.5.21"
},
{
"status": "affected",
"version": "\u003e= 16.0.0, \u003c 16.2.11"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Next.js is a React framework for building full-stack web applications. In versions 12.0.0 through 15.5.20 and 16.0.0 through 16.2.10, Next.js applications using App Router, Server Actions (use server) or use cache endpoints can be disclosed bypassing any authentication on the pages where these endpoints are usually used. Server Action IDs can be disclosed to unauthenticated users via publicly served client artifacts (for example, static chunks containing action references). Affected users are applications using App Router and Server Actions. By itself, this disclosure is typically a recon/enumeration primitive; however, it can increase risk when combined with other weaknesses. This issue has been fixed in versions 15.5.21 and 16.2.11."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"baseScore": 6.3,
"baseSeverity": "MEDIUM",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "LOW",
"vulnIntegrityImpact": "NONE"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-201",
"description": "CWE-201: Insertion of Sensitive Information Into Sent Data",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-07-27T17:48:17.575Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/vercel/next.js/security/advisories/GHSA-955p-x3mx-jcvp",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/vercel/next.js/security/advisories/GHSA-955p-x3mx-jcvp"
},
{
"name": "https://github.com/vercel/next.js/commit/1b0c3ae912a3ad925c60065cc8d55b070fa8bcd3",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/vercel/next.js/commit/1b0c3ae912a3ad925c60065cc8d55b070fa8bcd3"
},
{
"name": "https://github.com/vercel/next.js/commit/ff12a6124e1504f17b62de948b8a553fdecaef7b",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/vercel/next.js/commit/ff12a6124e1504f17b62de948b8a553fdecaef7b"
},
{
"name": "https://github.com/vercel/next.js/releases/tag/v15.5.21",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/vercel/next.js/releases/tag/v15.5.21"
},
{
"name": "https://github.com/vercel/next.js/releases/tag/v16.2.11",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/vercel/next.js/releases/tag/v16.2.11"
}
],
"source": {
"advisory": "GHSA-955p-x3mx-jcvp",
"discovery": "UNKNOWN"
},
"title": "Next.js: Unauthenticated Disclosure of Internal Server Function endpoints"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-64643",
"datePublished": "2026-07-27T17:48:17.575Z",
"dateReserved": "2026-07-20T17:11:30.895Z",
"dateUpdated": "2026-07-27T18:21:55.549Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-64643\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-07-27T18:20:57.639287Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-07-27T18:21:51.553Z\"}}], \"cna\": {\"title\": \"Next.js: Unauthenticated Disclosure of Internal Server Function endpoints\", \"source\": {\"advisory\": \"GHSA-955p-x3mx-jcvp\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV4_0\": {\"version\": \"4.0\", \"baseScore\": 6.3, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"PRESENT\", \"privilegesRequired\": \"NONE\", \"subIntegrityImpact\": \"NONE\", \"vulnIntegrityImpact\": \"NONE\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"NONE\", \"subConfidentialityImpact\": \"NONE\", \"vulnConfidentialityImpact\": \"LOW\"}}], \"affected\": [{\"vendor\": \"vercel\", \"product\": \"next.js\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003e= 13.0.0, \u003c 15.5.21\"}, {\"status\": \"affected\", \"version\": \"\u003e= 16.0.0, \u003c 16.2.11\"}]}], \"references\": [{\"url\": \"https://github.com/vercel/next.js/security/advisories/GHSA-955p-x3mx-jcvp\", \"name\": \"https://github.com/vercel/next.js/security/advisories/GHSA-955p-x3mx-jcvp\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/vercel/next.js/commit/1b0c3ae912a3ad925c60065cc8d55b070fa8bcd3\", \"name\": \"https://github.com/vercel/next.js/commit/1b0c3ae912a3ad925c60065cc8d55b070fa8bcd3\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/vercel/next.js/commit/ff12a6124e1504f17b62de948b8a553fdecaef7b\", \"name\": \"https://github.com/vercel/next.js/commit/ff12a6124e1504f17b62de948b8a553fdecaef7b\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/vercel/next.js/releases/tag/v15.5.21\", \"name\": \"https://github.com/vercel/next.js/releases/tag/v15.5.21\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/vercel/next.js/releases/tag/v16.2.11\", \"name\": \"https://github.com/vercel/next.js/releases/tag/v16.2.11\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"Next.js is a React framework for building full-stack web applications. In versions 12.0.0 through 15.5.20 and 16.0.0 through 16.2.10, Next.js applications using App Router, Server Actions (use server) or use cache endpoints can be disclosed bypassing any authentication on the pages where these endpoints are usually used. Server Action IDs can be disclosed to unauthenticated users via publicly served client artifacts (for example, static chunks containing action references). Affected users are applications using App Router and Server Actions. By itself, this disclosure is typically a recon/enumeration primitive; however, it can increase risk when combined with other weaknesses. This issue has been fixed in versions 15.5.21 and 16.2.11.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-201\", \"description\": \"CWE-201: Insertion of Sensitive Information Into Sent Data\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-07-27T17:48:17.575Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-64643\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-07-27T18:21:55.549Z\", \"dateReserved\": \"2026-07-20T17:11:30.895Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2026-07-27T17:48:17.575Z\", \"assignerShortName\": \"GitHub_M\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…