135 lines
5.9 KiB
JSON
135 lines
5.9 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-2026-27586",
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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": "2026-02-20T17:40:28.450Z",
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"datePublished": "2026-02-24T16:08:20.569Z",
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"dateUpdated": "2026-02-26T20:56:20.526Z"
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},
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"containers": {
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"cna": {
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"title": "Caddy's mTLS client authentication silently fails open when CA certificate file is missing or malformed",
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"problemTypes": [
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{
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"descriptions": [
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{
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"cweId": "CWE-755",
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"lang": "en",
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"description": "CWE-755: Improper Handling of Exceptional Conditions",
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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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"metrics": [
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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": "NONE",
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"userInteraction": "NONE",
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"vulnConfidentialityImpact": "HIGH",
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"vulnIntegrityImpact": "HIGH",
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"vulnAvailabilityImpact": "NONE",
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"subConfidentialityImpact": "NONE",
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"subIntegrityImpact": "NONE",
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"subAvailabilityImpact": "NONE",
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"baseScore": 8.8,
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"baseSeverity": "HIGH",
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"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:P",
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"version": "4.0"
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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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"name": "https://github.com/caddyserver/caddy/security/advisories/GHSA-hffm-g8v7-wrv7",
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"tags": [
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"x_refsource_CONFIRM"
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],
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"url": "https://github.com/caddyserver/caddy/security/advisories/GHSA-hffm-g8v7-wrv7"
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},
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{
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"name": "https://gist.github.com/moscowchill/9566c79c76c0b64c57f8bd0716f97c48",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://gist.github.com/moscowchill/9566c79c76c0b64c57f8bd0716f97c48"
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},
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{
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"name": "https://github.com/caddyserver/caddy/releases/tag/v2.11.1",
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"tags": [
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"x_refsource_MISC"
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],
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"url": "https://github.com/caddyserver/caddy/releases/tag/v2.11.1"
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}
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],
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"affected": [
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{
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"vendor": "caddyserver",
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"product": "caddy",
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"versions": [
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{
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"version": "< 2.11.1",
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"status": "affected"
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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": "a0819718-46f1-4df5-94e2-005712e83aaa",
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"shortName": "GitHub_M",
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"dateUpdated": "2026-02-24T16:08:20.569Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, two swallowed errors in `ClientAuthentication.provision()` cause mTLS client certificate authentication to silently fail open when a CA certificate file is missing, unreadable, or malformed. The server starts without error but accepts any client certificate signed by any system-trusted CA, completely bypassing the intended private CA trust boundary. Any deployment using `trusted_ca_cert_file` or `trusted_ca_certs_pem_files` for mTLS will silently degrade to accepting any system-trusted client certificate if the CA file becomes unavailable. This can happen due to a typo in the path, file rotation, corruption, or permission changes. The server gives no indication that mTLS is misconfigured. Version 2.11.1 fixes the vulnerability."
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}
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],
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"source": {
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"advisory": "GHSA-hffm-g8v7-wrv7",
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"discovery": "UNKNOWN"
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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": "2026-02-26T20:55:27.670740Z",
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"id": "CVE-2026-27586",
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"options": [
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{
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"Exploitation": "poc"
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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": "2026-02-26T20:56:20.526Z"
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}
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}
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]
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}
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} |