198 lines
10 KiB
JSON
198 lines
10 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-2026-63075",
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"assignerOrgId": "3a12439a-ef3a-4c79-92e6-6081a721f1e5",
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"state": "PUBLISHED",
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"assignerShortName": "openssl",
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"dateReserved": "2026-07-15T13:10:26.188Z",
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"datePublished": "2026-08-25T13:00:04.752Z",
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"dateUpdated": "2026-08-25T14:36:51.928Z"
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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": "unaffected",
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"product": "OpenSSL",
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"vendor": "OpenSSL",
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"versions": [
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{
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"lessThan": "4.0.2",
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"status": "affected",
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"version": "4.0.0",
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"versionType": "semver"
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},
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{
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"lessThan": "3.6.4",
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"status": "affected",
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"version": "3.6.0",
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"versionType": "semver"
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},
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{
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"lessThan": "3.5.8",
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"status": "affected",
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"version": "3.5.0",
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"versionType": "semver"
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},
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{
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"lessThan": "3.4.7",
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"status": "affected",
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"version": "3.4.0",
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"versionType": "semver"
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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": "reporter",
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"value": "Opal Wright (Trail of Bits)"
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},
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{
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"lang": "en",
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"type": "remediation developer",
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"value": "Neil Horman"
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}
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],
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"datePublic": "2026-08-25T11:36:16.000Z",
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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": "Issue summary: When OpenSSL processes QUIC traffic from a peer that repeatedly<br>sends ack-eliciting packets while not acknowledging ACK-only responses, the<br>QUIC stack can retain ACK-only packet metadata for the lifetime of the<br>connection.<br><br>Impact summary: A remote peer that can complete a QUIC handshake can<br>cause connection-scoped memory growth which may lead to Denial of Service<br>through memory exhaustion, especially with sustained traffic or many concurrent<br>QUIC connections.<br><br>CWE: CWE-770: Allocation of Resources Without Limits or Throttling<br><br>Description: When the OpenSSL QUIC stack sends an ACK-only packet,<br>there is no requirement by the QUIC protocol that the peer will acknowledge<br>that ACK-only packet (i.e. it is itself not ack-eliciting). However, the OpenSSL<br>implementation stores the metadata about the ACK frames regardless.<br>In and of itself that's ok, but if a malicious peer establishes a connection, and<br>then drives the connection such that ACK-only packets are forced from the <br>OpenSSL implementation peer (i.e., by sending numerous PING frames),<br>and then withholding any subsequent acks for ack-eliciting data, like<br>legitimate data, said malicious peer can force inappropriate memory growth<br>on the OpenSSL peer, potentially leading to a Denial of Service.<br><br>The fix is to ensure that we account for the transmission of the ACK-only<br>packet in the packet histories high and low watermark without actually storing<br>the ACK-only packet metadata itself.<br><br>FIPS impact: no<br>The OpenSSL FIPS module is not affected as the QUIC code is<br>outside the FIPS module boundary."
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}
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],
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"value": "Issue summary: When OpenSSL processes QUIC traffic from a peer that repeatedly\nsends ack-eliciting packets while not acknowledging ACK-only responses, the\nQUIC stack can retain ACK-only packet metadata for the lifetime of the\nconnection.\n\nImpact summary: A remote peer that can complete a QUIC handshake can\ncause connection-scoped memory growth which may lead to Denial of Service\nthrough memory exhaustion, especially with sustained traffic or many concurrent\nQUIC connections.\n\nCWE: CWE-770: Allocation of Resources Without Limits or Throttling\n\nDescription: When the OpenSSL QUIC stack sends an ACK-only packet,\nthere is no requirement by the QUIC protocol that the peer will acknowledge\nthat ACK-only packet (i.e. it is itself not ack-eliciting). However, the OpenSSL\nimplementation stores the metadata about the ACK frames regardless.\nIn and of itself that's ok, but if a malicious peer establishes a connection, and\nthen drives the connection such that ACK-only packets are forced from the \nOpenSSL implementation peer (i.e., by sending numerous PING frames),\nand then withholding any subsequent acks for ack-eliciting data, like\nlegitimate data, said malicious peer can force inappropriate memory growth\non the OpenSSL peer, potentially leading to a Denial of Service.\n\nThe fix is to ensure that we account for the transmission of the ACK-only\npacket in the packet histories high and low watermark without actually storing\nthe ACK-only packet metadata itself.\n\nFIPS impact: no\nThe OpenSSL FIPS module is not affected as the QUIC code is\noutside the FIPS module boundary."
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}
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],
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"metrics": [
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{
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"format": "other",
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"other": {
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"content": {
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"text": "Low"
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},
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"type": "https://openssl-library.org/policies/general/security-policy/"
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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-770",
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"description": "CWE-770 Allocation of Resources Without Limits or Throttling",
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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": "3a12439a-ef3a-4c79-92e6-6081a721f1e5",
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"shortName": "openssl",
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"dateUpdated": "2026-08-25T13:00:04.752Z"
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},
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"references": [
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{
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"name": "OpenSSL Advisory",
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"tags": [
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"vendor-advisory"
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],
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"url": "https://openssl-library.org/news/secadv/20260825.txt"
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},
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{
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"name": "4.0.2 git commit",
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"tags": [
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"patch"
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],
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"url": "https://github.com/openssl/openssl/commit/7308946576b12e64b8be53bcf0a120354b2b42bc"
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},
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{
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"name": "3.6.4 git commit",
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"tags": [
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"patch"
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],
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"url": "https://github.com/openssl/openssl/commit/bf84721c2548351176e367e6de505792f0118dc6"
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},
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{
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"name": "3.5.8 git commit",
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"tags": [
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"patch"
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],
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"url": "https://github.com/openssl/openssl/commit/7c98d79738549df92868e7dd9be4bbf061eed709"
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},
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{
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"name": "3.4.7 git commit",
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"tags": [
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"patch"
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],
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"url": "https://github.com/openssl/openssl/commit/c902e5f16d6a9e130e96d3ca6d8f64d71652e393"
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}
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],
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"source": {
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"discovery": "UNKNOWN"
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},
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"title": "QUIC ACK-only Packet Retention Can Cause Memory Exhaustion",
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"x_generator": {
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"engine": "Vulnogram 0.2.0"
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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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"cvssV3_1": {
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"scope": "UNCHANGED",
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"version": "3.1",
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"baseScore": 7.5,
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"attackVector": "NETWORK",
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"baseSeverity": "HIGH",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"integrityImpact": "NONE",
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"userInteraction": "NONE",
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"attackComplexity": "LOW",
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"availabilityImpact": "HIGH",
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"privilegesRequired": "NONE",
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"confidentialityImpact": "NONE"
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}
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},
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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": "2026-08-25T14:36:48.832724Z",
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"id": "CVE-2026-63075",
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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": "yes"
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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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"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": "2026-08-25T14:36:51.928Z"
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}
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}
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]
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}
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} |