206 lines
10 KiB
JSON
206 lines
10 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"cveMetadata": {
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"cveId": "CVE-2026-55676",
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"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"state": "PUBLISHED",
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"assignerShortName": "GitHub_M",
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"dateReserved": "2026-06-17T00:05:03.778Z",
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"datePublished": "2026-08-11T20:24:50.803Z",
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"dateUpdated": "2026-10-02T20:20:14.228Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6",
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"shortName": "icscert",
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"dateUpdated": "2026-10-02T20:20:14.228Z"
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},
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"title": "Malcolm vulnerable to RCE via unrestricted .php upload to the file-upload component",
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"cweId": "CWE-434",
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"description": "CWE-434: Unrestricted Upload of File with Dangerous Type",
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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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"affected": [
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{
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"vendor": "cisagov",
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"product": "Malcolm",
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"versions": [
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{
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"status": "affected",
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"version": "< 26.06.1"
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},
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{
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"status": "unaffected",
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"version": "26.06.1"
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}
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],
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"defaultStatus": "unaffected"
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}
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],
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"descriptions": [
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{
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"lang": "en",
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"value": "Malcolm is a network traffic analysis tool suite. The file-upload component (FilePond PHP backend) accepts uploads at `POST /server/php/submit.php` and stores them in a directory served by the same nginx and php-fpm instance. The allow-list that should restrict accepted file types is an empty array by default (`file-upload/php/config.php:16`), so the type check is a no-op and every extension is accepted. The filename sanitizer keeps the `.php` extension intact. Committed files land in `/var/www/upload/server/php/files` (`file-upload/php/config.php:7`), and the component's nginx routes any URL ending in `.php` to php-fpm. An authenticated `GET /server/php/files/<name>.php` then executes the uploaded code as `www-data`. Prior to version 26.06.1, in RBAC mode, the upload endpoint is reachable by the granular `ROLE_UPLOAD` role (`nginx/lua/nginx_auth_helpers.lua:71`), a role intended only for submitting capture files. As a result, a user holding the upload-only role runs arbitrary PHP as `www-data` inside the file-upload container. Version 26.06.1 fixes the issue.",
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"supportingMedia": [
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{
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"type": "text/html",
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"base64": false,
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"value": "<p>Malcolm is a network traffic analysis tool suite. The file-upload component (FilePond PHP backend) accepts uploads at `POST /server/php/submit.php` and stores them in a directory served by the same nginx and php-fpm instance. The allow-list that should restrict accepted file types is an empty array by default (`file-upload/php/config.php:16`), so the type check is a no-op and every extension is accepted. The filename sanitizer keeps the `.php` extension intact. Committed files land in `/var/www/upload/server/php/files` (`file-upload/php/config.php:7`), and the component's nginx routes any URL ending in `.php` to php-fpm. An authenticated `GET /server/php/files/<name>.php` then executes the uploaded code as `www-data`. Prior to version 26.06.1, in RBAC mode, the upload endpoint is reachable by the granular `ROLE_UPLOAD` role (`nginx/lua/nginx_auth_helpers.lua:71`), a role intended only for submitting capture files. As a result, a user holding the upload-only role runs arbitrary PHP as `www-data` inside the file-upload container. Version 26.06.1 fixes the issue.</p>"
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}
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]
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}
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],
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"references": [
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{
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"url": "https://github.com/cisagov/Malcolm/security/advisories/GHSA-8cvp-m7pg-qrp7",
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"name": "https://github.com/cisagov/Malcolm/security/advisories/GHSA-8cvp-m7pg-qrp7",
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"tags": [
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"x_refsource_CONFIRM"
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]
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},
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{
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"url": "https://github.com/cisagov/Malcolm/releases/tag/v26.06.1",
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"name": "https://github.com/cisagov/Malcolm/releases/tag/v26.06.1",
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"tags": [
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"x_refsource_MISC"
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]
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},
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{
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"url": "https://www.cisa.gov/news-events/ics-advisories/icsa-26-230-01"
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},
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{
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"url": "https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-230-01.json"
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}
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],
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"metrics": [
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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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"cvssV3_1": {
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"version": "3.1",
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"attackVector": "NETWORK",
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"attackComplexity": "LOW",
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"privilegesRequired": "LOW",
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"userInteraction": "NONE",
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"scope": "UNCHANGED",
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"confidentialityImpact": "HIGH",
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"integrityImpact": "HIGH",
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"availabilityImpact": "HIGH",
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"baseSeverity": "HIGH",
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"baseScore": 8.8,
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
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}
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},
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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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"cvssV4_0": {
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"attackVector": "NETWORK",
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"attackComplexity": "LOW",
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"attackRequirements": "NONE",
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"privilegesRequired": "LOW",
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"userInteraction": "NONE",
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"vulnConfidentialityImpact": "HIGH",
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"subConfidentialityImpact": "NONE",
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"vulnIntegrityImpact": "HIGH",
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"subIntegrityImpact": "NONE",
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"vulnAvailabilityImpact": "HIGH",
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"subAvailabilityImpact": "NONE",
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"exploitMaturity": "NOT_DEFINED",
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"Safety": "NOT_DEFINED",
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"Automatable": "NOT_DEFINED",
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"Recovery": "NOT_DEFINED",
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"valueDensity": "NOT_DEFINED",
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"vulnerabilityResponseEffort": "NOT_DEFINED",
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"providerUrgency": "NOT_DEFINED",
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"version": "4.0",
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"baseSeverity": "HIGH",
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"baseScore": 8.7,
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"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
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}
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}
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],
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"solutions": [
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{
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"lang": "en",
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"value": "Malcolm version 26.06.1 addresses this issue. For more information, see https://github.com/cisagov/Malcolm/pull/1026",
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"supportingMedia": [
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{
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"type": "text/html",
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"base64": false,
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"value": "Malcolm version 26.06.1 addresses this issue. For more information, see <a href=\"https://github.com/cisagov/Malcolm/pull/1026\">https://github.com/cisagov/Malcolm/pull/1026</a>"
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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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"value": "kah-ja, DeathRipper21 reported CVE-2026-55676 to CISA.",
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"type": "finder"
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}
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],
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"source": {
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"advisory": "GHSA-8cvp-m7pg-qrp7",
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"discovery": "EXTERNAL"
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},
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"x_generator": {
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"engine": "Vulnogram 1.0.5"
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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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"timestamp": "2026-08-12T22:09:13.650474Z",
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"id": "CVE-2026-55676",
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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": "total"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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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": "2026-08-12T22:13:05.815Z"
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}
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}
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]
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},
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"dataVersion": "5.2"
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} |