203 lines
11 KiB
JSON
203 lines
11 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-101019",
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"assignerOrgId": "9dacffd4-cb11-413f-8451-fbbfd4ddc0ab",
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"state": "PUBLISHED",
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"assignerShortName": "f5",
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"dateReserved": "2026-09-30T21:56:14.632Z",
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"datePublished": "2026-10-14T14:40:29.685Z",
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"dateUpdated": "2026-10-15T16:43:46.354Z"
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},
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"containers": {
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"cna": {
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"affected": [
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{
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"defaultStatus": "unknown",
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"modules": [
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"ngx_http_js_module"
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],
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"product": "NGINX JavaScript",
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"vendor": "F5",
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"versions": [
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{
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"lessThan": "1.0.2",
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"status": "affected",
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"version": "0.7.10",
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"versionType": "custom"
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}
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]
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}
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],
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"credits": [
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{
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"lang": "en",
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"type": "finder",
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"value": "F5"
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}
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],
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"datePublic": "2023-01-01T00:00:00.000Z",
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"descriptions": [
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{
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"lang": "en",
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"supportingMedia": [
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{
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"base64": false,
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"type": "text/html",
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"value": "Description<br><span style=\"background-color: rgb(255, 255, 255);\">NGINX JavaScript (njs) has a vulnerability where the njs XML module exposes entity-backed XML attributes inconsistently with libxml2 canonicalization. In both the built-in njs and QuickJS backends during the canonicalization process, the $attr$Name getter may return undefined for an explicitly present attribute containing an internal entity reference. The $attrs getter may return a value derived only from the first attribute child. This may allow an unauthenticated attacker that invests significant effort in obtaining a genuinely signed document to skip validation while signature verification succeeds. An nginx-saml deployment is a confirmed affected consumer when run with the built-in njs backend.<br></span><br>Impact<br>In affected signed-XML consumers, an unauthenticated attacker can cause security-relevant attributes to appear absent or truncated while signature verification succeeds. In nginx-saml, this can bypass expiry, Destination, and request-correlation checks, enabling replay or acceptance of a response outside its intended context. It does not permit signature or identity forgery, or a direct availability impact. <span style=\"background-color: rgb(255, 255, 255);\">There is no control plane exposure; this is a data plane issue only.</span>\n\n<br><br> Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated."
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}
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],
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"value": "Description\nNGINX JavaScript (njs) has a vulnerability where the njs XML module exposes entity-backed XML attributes inconsistently with libxml2 canonicalization. In both the built-in njs and QuickJS backends during the canonicalization process, the $attr$Name getter may return undefined for an explicitly present attribute containing an internal entity reference. The $attrs getter may return a value derived only from the first attribute child. This may allow an unauthenticated attacker that invests significant effort in obtaining a genuinely signed document to skip validation while signature verification succeeds. An nginx-saml deployment is a confirmed affected consumer when run with the built-in njs backend.\n\nImpact\nIn affected signed-XML consumers, an unauthenticated attacker can cause security-relevant attributes to appear absent or truncated while signature verification succeeds. In nginx-saml, this can bypass expiry, Destination, and request-correlation checks, enabling replay or acceptance of a response outside its intended context. It does not permit signature or identity forgery, or a direct availability impact. There is no control plane exposure; this is a data plane issue only.\n\n\n\n Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated."
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}
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],
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"impacts": [
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{
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"capecId": "CAPEC-267",
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"descriptions": [
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{
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"lang": "en",
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"value": "CAPEC-267 Leverage Alternate Encoding"
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}
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]
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"attackComplexity": "HIGH",
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"attackVector": "NETWORK",
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"availabilityImpact": "NONE",
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"baseScore": 6.5,
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"baseSeverity": "MEDIUM",
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"confidentialityImpact": "HIGH",
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"integrityImpact": "LOW",
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"privilegesRequired": "NONE",
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"scope": "UNCHANGED",
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"userInteraction": "NONE",
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"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N",
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"version": "3.1"
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},
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"format": "CVSS",
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"scenarios": [
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{
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"lang": "en",
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"value": "GENERAL"
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}
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]
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},
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{
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"cvssV4_0": {
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"Automatable": "NOT_DEFINED",
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"Recovery": "NOT_DEFINED",
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"Safety": "NOT_DEFINED",
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"attackComplexity": "LOW",
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"attackRequirements": "PRESENT",
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"attackVector": "NETWORK",
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"baseScore": 8.3,
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"baseSeverity": "HIGH",
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"privilegesRequired": "NONE",
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"providerUrgency": "NOT_DEFINED",
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"subAvailabilityImpact": "NONE",
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"subConfidentialityImpact": "NONE",
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"subIntegrityImpact": "NONE",
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"userInteraction": "NONE",
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"valueDensity": "NOT_DEFINED",
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"vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N",
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"version": "4.0",
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"vulnAvailabilityImpact": "NONE",
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"vulnConfidentialityImpact": "HIGH",
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"vulnIntegrityImpact": "LOW",
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"vulnerabilityResponseEffort": "NOT_DEFINED"
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},
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"format": "CVSS",
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"scenarios": [
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{
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"lang": "en",
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"value": "GENERAL"
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}
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]
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}
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],
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-436",
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"description": "CWE-436 Interpretation Conflict",
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"lang": "en",
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"type": "CWE"
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}
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]
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}
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],
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"providerMetadata": {
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"orgId": "9dacffd4-cb11-413f-8451-fbbfd4ddc0ab",
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"shortName": "f5",
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"dateUpdated": "2026-10-14T14:40:29.685Z"
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},
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"references": [
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{
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"tags": [
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"vendor-advisory"
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],
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"url": "https://my.f5.com/manage/s/article/K000162615"
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}
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],
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"source": {
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"discovery": "INTERNAL"
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},
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"title": "NGINX ngx_http_js_module vulnerability",
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"workarounds": [
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{
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"lang": "en",
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"supportingMedia": [
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{
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"base64": false,
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"type": "text/html",
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"value": "<span style=\"background-color: rgb(255, 255, 255);\">Applications processing signed XML should reject DTD-bearing input before calling xml.parse(). The check must cover the complete document after decoding its accepted input encoding; a parser-level DTD prohibition is preferable to a raw byte search for \"<!DOCTYPE\". <br><br>Applications should also treat absent security-relevant attributes as validation failures rather than optional values. nginx-saml deployments should explicitly validate Destination, request correlation when unsolicited SSO is not intended, assertion validity, bearer SubjectConfirmation, Recipient, and SubjectConfirmationData InResponseTo.</span>"
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}
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],
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"value": "Applications processing signed XML should reject DTD-bearing input before calling xml.parse(). The check must cover the complete document after decoding its accepted input encoding; a parser-level DTD prohibition is preferable to a raw byte search for \"<!DOCTYPE\". \n\nApplications should also treat absent security-relevant attributes as validation failures rather than optional values. nginx-saml deployments should explicitly validate Destination, request correlation when unsolicited SSO is not intended, assertion validity, bearer SubjectConfirmation, Recipient, and SubjectConfirmationData InResponseTo."
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}
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],
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"x_generator": {
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"engine": "F5 SIRTBot v1.0"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-101019",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-15T15:54:18.777169Z"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-10-15T16:43:46.354Z"
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}
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}
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]
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}
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} |