CVE-2025-15079 (GCVE-0-2025-15079)

Vulnerability from cvelistv5 – Published: 2026-01-08 10:08 – Updated: 2026-01-08 14:46
VLAI?
Title
libssh global known_hosts override
Summary
When doing SSH-based transfers using either SCP or SFTP, and setting the known_hosts file, libcurl could still mistakenly accept connecting to hosts *not present* in the specified file if they were added as recognized in the libssh *global* known_hosts file.
Severity ?
5.3 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
CWE
Assigner
References
Impacted products
Vendor Product Version
curl curl Affected: 8.17.0 , ≤ 8.17.0 (semver)
Affected: 8.16.0 , ≤ 8.16.0 (semver)
Affected: 8.15.0 , ≤ 8.15.0 (semver)
Affected: 8.14.1 , ≤ 8.14.1 (semver)
Affected: 8.14.0 , ≤ 8.14.0 (semver)
Affected: 8.13.0 , ≤ 8.13.0 (semver)
Affected: 8.12.1 , ≤ 8.12.1 (semver)
Affected: 8.12.0 , ≤ 8.12.0 (semver)
Affected: 8.11.1 , ≤ 8.11.1 (semver)
Affected: 8.11.0 , ≤ 8.11.0 (semver)
Affected: 8.10.1 , ≤ 8.10.1 (semver)
Affected: 8.10.0 , ≤ 8.10.0 (semver)
Affected: 8.9.1 , ≤ 8.9.1 (semver)
Affected: 8.9.0 , ≤ 8.9.0 (semver)
Affected: 8.8.0 , ≤ 8.8.0 (semver)
Affected: 8.7.1 , ≤ 8.7.1 (semver)
Affected: 8.7.0 , ≤ 8.7.0 (semver)
Affected: 8.6.0 , ≤ 8.6.0 (semver)
Affected: 8.5.0 , ≤ 8.5.0 (semver)
Affected: 8.4.0 , ≤ 8.4.0 (semver)
Affected: 8.3.0 , ≤ 8.3.0 (semver)
Affected: 8.2.1 , ≤ 8.2.1 (semver)
Affected: 8.2.0 , ≤ 8.2.0 (semver)
Affected: 8.1.2 , ≤ 8.1.2 (semver)
Affected: 8.1.1 , ≤ 8.1.1 (semver)
Affected: 8.1.0 , ≤ 8.1.0 (semver)
Affected: 8.0.1 , ≤ 8.0.1 (semver)
Affected: 8.0.0 , ≤ 8.0.0 (semver)
Affected: 7.88.1 , ≤ 7.88.1 (semver)
Affected: 7.88.0 , ≤ 7.88.0 (semver)
Affected: 7.87.0 , ≤ 7.87.0 (semver)
Affected: 7.86.0 , ≤ 7.86.0 (semver)
Affected: 7.85.0 , ≤ 7.85.0 (semver)
Affected: 7.84.0 , ≤ 7.84.0 (semver)
Affected: 7.83.1 , ≤ 7.83.1 (semver)
Affected: 7.83.0 , ≤ 7.83.0 (semver)
Affected: 7.82.0 , ≤ 7.82.0 (semver)
Affected: 7.81.0 , ≤ 7.81.0 (semver)
Affected: 7.80.0 , ≤ 7.80.0 (semver)
Affected: 7.79.1 , ≤ 7.79.1 (semver)
Affected: 7.79.0 , ≤ 7.79.0 (semver)
Affected: 7.78.0 , ≤ 7.78.0 (semver)
Affected: 7.77.0 , ≤ 7.77.0 (semver)
Affected: 7.76.1 , ≤ 7.76.1 (semver)
Affected: 7.76.0 , ≤ 7.76.0 (semver)
Affected: 7.75.0 , ≤ 7.75.0 (semver)
Affected: 7.74.0 , ≤ 7.74.0 (semver)
Affected: 7.73.0 , ≤ 7.73.0 (semver)
Affected: 7.72.0 , ≤ 7.72.0 (semver)
Affected: 7.71.1 , ≤ 7.71.1 (semver)
Affected: 7.71.0 , ≤ 7.71.0 (semver)
Affected: 7.70.0 , ≤ 7.70.0 (semver)
Affected: 7.69.1 , ≤ 7.69.1 (semver)
Affected: 7.69.0 , ≤ 7.69.0 (semver)
Affected: 7.68.0 , ≤ 7.68.0 (semver)
Affected: 7.67.0 , ≤ 7.67.0 (semver)
Affected: 7.66.0 , ≤ 7.66.0 (semver)
Affected: 7.65.3 , ≤ 7.65.3 (semver)
Affected: 7.65.2 , ≤ 7.65.2 (semver)
Affected: 7.65.1 , ≤ 7.65.1 (semver)
Affected: 7.65.0 , ≤ 7.65.0 (semver)
Affected: 7.64.1 , ≤ 7.64.1 (semver)
Affected: 7.64.0 , ≤ 7.64.0 (semver)
Affected: 7.63.0 , ≤ 7.63.0 (semver)
Affected: 7.62.0 , ≤ 7.62.0 (semver)
Affected: 7.61.1 , ≤ 7.61.1 (semver)
Affected: 7.61.0 , ≤ 7.61.0 (semver)
Affected: 7.60.0 , ≤ 7.60.0 (semver)
Affected: 7.59.0 , ≤ 7.59.0 (semver)
Affected: 7.58.0 , ≤ 7.58.0 (semver)
Create a notification for this product.
Credits
Harry Sintonen Daniel Stenberg
Show details on NVD website
To clipboard 

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    "nvd": "{\"cve\":{\"id\":\"CVE-2025-15079\",\"sourceIdentifier\":\"2499f714-1537-4658-8207-48ae4bb9eae9\",\"published\":\"2026-01-08T10:15:47.100\",\"lastModified\":\"2026-01-08T18:08:18.457\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"When doing SSH-based transfers using either SCP or SFTP, and setting the\\nknown_hosts file, libcurl could still mistakenly accept connecting to hosts\\n*not present* in the specified file if they were added as recognized in the\\nlibssh *global* known_hosts file.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N\",\"baseScore\":5.3,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"REQUIRED\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":1.6,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-297\"}]}],\"references\":[{\"url\":\"https://curl.se/docs/CVE-2025-15079.html\",\"source\":\"2499f714-1537-4658-8207-48ae4bb9eae9\"},{\"url\":\"https://curl.se/docs/CVE-2025-15079.json\",\"source\":\"2499f714-1537-4658-8207-48ae4bb9eae9\"},{\"url\":\"https://hackerone.com/reports/3477116\",\"source\":\"2499f714-1537-4658-8207-48ae4bb9eae9\"},{\"url\":\"http://www.openwall.com/lists/oss-security/2026/01/07/6\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}",
    "vulnrichment": {
      "containers": "{\"cna\": {\"title\": \"libssh global known_hosts override\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"When doing SSH-based transfers using either SCP or SFTP, and setting the\\nknown_hosts file, libcurl could still mistakenly accept connecting to hosts\\n*not present* in the specified file if they were added as recognized in the\\nlibssh *global* known_hosts file.\"}], \"providerMetadata\": {\"orgId\": \"2499f714-1537-4658-8207-48ae4bb9eae9\", \"shortName\": \"curl\", \"dateUpdated\": \"2026-01-08T10:08:13.410Z\"}, \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"description\": \"CWE-297 Improper Validation of Certificate with Host Mismatch\"}]}], \"affected\": [{\"vendor\": \"curl\", \"product\": \"curl\", \"versions\": [{\"version\": \"8.17.0\", \"status\": \"affected\", \"lessThanOrEqual\": \"8.17.0\", \"versionType\": \"semver\"}, {\"version\": \"8.16.0\", \"status\": \"affected\", \"lessThanOrEqual\": \"8.16.0\", \"versionType\": 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\"lessThanOrEqual\": \"8.10.1\", \"versionType\": \"semver\"}, {\"version\": \"8.10.0\", \"status\": \"affected\", \"lessThanOrEqual\": \"8.10.0\", \"versionType\": \"semver\"}, {\"version\": \"8.9.1\", \"status\": \"affected\", \"lessThanOrEqual\": \"8.9.1\", \"versionType\": \"semver\"}, {\"version\": \"8.9.0\", \"status\": \"affected\", \"lessThanOrEqual\": \"8.9.0\", \"versionType\": \"semver\"}, {\"version\": \"8.8.0\", \"status\": \"affected\", \"lessThanOrEqual\": \"8.8.0\", \"versionType\": \"semver\"}, {\"version\": \"8.7.1\", \"status\": \"affected\", \"lessThanOrEqual\": \"8.7.1\", \"versionType\": \"semver\"}, {\"version\": \"8.7.0\", \"status\": \"affected\", \"lessThanOrEqual\": \"8.7.0\", \"versionType\": \"semver\"}, {\"version\": \"8.6.0\", \"status\": \"affected\", \"lessThanOrEqual\": \"8.6.0\", \"versionType\": \"semver\"}, {\"version\": \"8.5.0\", \"status\": \"affected\", \"lessThanOrEqual\": \"8.5.0\", \"versionType\": \"semver\"}, {\"version\": \"8.4.0\", 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\"https://curl.se/docs/CVE-2025-15079.html\", \"name\": \"www\"}, {\"url\": \"https://hackerone.com/reports/3477116\", \"name\": \"issue\"}], \"credits\": [{\"lang\": \"en\", \"value\": \"Harry Sintonen\", \"type\": \"finder\"}, {\"lang\": \"en\", \"value\": \"Daniel Stenberg\", \"type\": \"remediation developer\"}]}, \"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"http://www.openwall.com/lists/oss-security/2026/01/07/6\"}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2026-01-08T11:06:21.628Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 5.3, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"REQUIRED\", \"attackComplexity\": \"HIGH\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2025-15079\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-01-08T14:45:34.542278Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-297\", \"description\": \"CWE-297 Improper Validation of Certificate with Host Mismatch\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-01-08T14:45:56.225Z\"}}]}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-15079\", \"assignerOrgId\": \"2499f714-1537-4658-8207-48ae4bb9eae9\", \"state\": \"PUBLISHED\", \"assignerShortName\": \"curl\", \"dateReserved\": \"2025-12-24T22:18:18.481Z\", \"datePublished\": \"2026-01-08T10:08:13.410Z\", \"dateUpdated\": \"2026-01-08T14:46:47.042Z\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.