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CVE-2026-67293

FreeRDP before 3.29.0 (affected versions <= 3.28.0) contains an improper certificate hostname validation vulnerability. The TLS hostname matcher (tls_match_hostname() in libfreerdp/crypto/tls.c) treats a wildcard pattern such as *.example.com as matching any hostname ending in .example.com, so it incorrectly accepts a wildcard certificate for multi-label subdomains like a.b.example.com (which OpenSSL's X509_check_host() rejects). This weakens TLS server authentication under wildcard-certificate
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:0ec9af4131fa786aaab8ed5efa4d33318e5faa7a0e530e211b0412fa7b8f2f4a
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 2 assertions

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":9.3,"baseSeverity":"CRITICAL","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpac…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:b3cc103a3307ffd9158b5dd89ff7945256f4fe194cbb01d24f0146b26d331543 · sha256:0e3a12aceb95cbe5… · /containers/cna/metrics/0/cvssV4_0

{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.2,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:b3cc103a3307ffd9158b5dd89ff7945256f4fe194cbb01d24f0146b26d331543 · sha256:0e3a12aceb95cbe5… · /containers/cna/metrics/1/cvssV3_1

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","product":"FreeRDP","vendor":"FreeRDP","versions":[{"lessThan":"3.29.0","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"3.29.0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b3cc103a3307ffd9158b5dd89ff7945256f4fe194cbb01d24f0146b26d331543 · sha256:0e3a12aceb95cbe5… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":9.3,"baseSeverity":"CRITICAL","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpac…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:b3cc103a3307ffd9158b5dd89ff7945256f4fe194cbb01d24f0146b26d331543 · sha256:0e3a12aceb95cbe5… · /containers/cna/metrics/0/cvssV4_0
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.2,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:b3cc103a3307ffd9158b5dd89ff7945256f4fe194cbb01d24f0146b26d331543 · sha256:0e3a12aceb95cbe5… · /containers/cna/metrics/1/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-295","description":"Improper Certificate Validation","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:b3cc103a3307ffd9158b5dd89ff7945256f4fe194cbb01d24f0146b26d331543 · sha256:0e3a12aceb95cbe5… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions
{"name":"Patch Commit","tags":["patch"],"url":"https://github.com/FreeRDP/FreeRDP/commit/f3b4347105114fe7453828736bea069999af319f"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b3cc103a3307ffd9158b5dd89ff7945256f4fe194cbb01d24f0146b26d331543 · sha256:0e3a12aceb95cbe5… · /containers/cna/references/1
{"tags":["exploit"],"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-5wr6-8m8j-3h7f"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b3cc103a3307ffd9158b5dd89ff7945256f4fe194cbb01d24f0146b26d331543 · sha256:0e3a12aceb95cbe5… · /containers/adp/0/references/0
{"name":"GitHub Security Advisory (GHSA-5wr6-8m8j-3h7f)","tags":["vendor-advisory"],"url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-5wr6-8m8j-3h7f"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b3cc103a3307ffd9158b5dd89ff7945256f4fe194cbb01d24f0146b26d331543 · sha256:0e3a12aceb95cbe5… · /containers/cna/references/0
{"name":"VulnCheck Advisory: FreeRDP before 3.29.0 Improper Certificate Hostname Validation","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/freerdp-before-improper-certificate-hostname-validation"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b3cc103a3307ffd9158b5dd89ff7945256f4fe194cbb01d24f0146b26d331543 · sha256:0e3a12aceb95cbe5… · /containers/cna/references/2

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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