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vuln-cve/data/2026/16xxx/CVE-2026-16158.json
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{
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"cveMetadata": {
"cveId": "CVE-2026-16158",
"assignerOrgId": "ce714d77-add3-4f53-aff5-83d477b104bb",
"state": "PUBLISHED",
"assignerShortName": "openjs",
"dateReserved": "2026-07-17T21:22:28.153Z",
"datePublished": "2026-07-18T12:28:17.262Z",
"dateUpdated": "2026-07-20T15:15:50.016Z"
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"lang": "en",
"value": "Impact: @fastify/reply-from versions from 8.3.1 up to but not including 12.6.4 build the internal URL cache key by concatenating the destination and source path without a delimiter. Different destination and source pairs can therefore produce the same key while resolving to different upstream URLs. When getUpstream selects an upstream from request data, a URL cached for one upstream can be reused for a request intended for another upstream, causing cross-upstream data access and modification. The default configuration is affected. Setting disableCache to true prevents the behavior. Patches: upgrade to @fastify/reply-from 12.6.4. Workarounds: pass disableCache: true when registering the plugin.",
"supportingMedia": [
{
"type": "text/html",
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"value": "Impact: @fastify/reply-from versions from 8.3.1 up to but not including 12.6.4 build the internal URL cache key by concatenating the destination and source path without a delimiter. Different destination and source pairs can therefore produce the same key while resolving to different upstream URLs. When getUpstream selects an upstream from request data, a URL cached for one upstream can be reused for a request intended for another upstream, causing cross-upstream data access and modification. The default configuration is affected. Setting disableCache to true prevents the behavior. Patches: upgrade to @fastify/reply-from 12.6.4. Workarounds: pass disableCache: true when registering the plugin."
}
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}
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"product": "@fastify/reply-from",
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"versionType": "semver",
"status": "affected",
"version": "8.3.1",
"lessThan": "12.6.4"
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"status": "unaffected",
"version": "12.6.4"
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"packageURL": "pkg:npm/@fastify/reply-from"
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"references": [
{
"url": "https://github.com/fastify/fastify-reply-from/security/advisories/GHSA-v574-6498-x57v"
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{
"url": "https://cna.openjsf.org/security-advisories.html"
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"lang": "en",
"type": "reporter",
"value": "HamdaanAliQuatil"
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{
"lang": "en",
"type": "remediation developer",
"value": "mcollina"
},
{
"lang": "en",
"type": "remediation reviewer",
"value": "UlisesGascon"
},
{
"lang": "en",
"type": "remediation reviewer",
"value": "climba03003"
}
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"title": "@fastify/reply-from vulnerable to cross-upstream request routing via URL cache key collision",
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"format": "CVSS",
"cvssV3_1": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N",
"baseScore": 8.7,
"baseSeverity": "HIGH"
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"scenarios": [
{
"lang": "en",
"value": "GENERAL"
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]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-441",
"lang": "en",
"description": "CWE-441: Unintended Proxy or Intermediary ('Confused Deputy')",
"type": "CWE"
}
]
}
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"engine": "cve-kit 1.0.0"
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"metrics": [
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"other": {
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"content": {
"timestamp": "2026-07-20T15:15:40.003591Z",
"id": "CVE-2026-16158",
"options": [
{
"Exploitation": "none"
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{
"Automatable": "no"
},
{
"Technical Impact": "total"
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"role": "CISA Coordinator",
"version": "2.0.3"
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"title": "CISA ADP Vulnrichment",
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