CVE-2026-44405 (GCVE-0-2026-44405)

Vulnerability from cvelistv5 – Published: 2026-05-05 23:50 – Updated: 2026-05-06 12:54
VLAI
Summary
In Paramiko through 4.0.0 before a448945, rsakey.py allows the SHA-1 algorithm.
Severity
3.4 (Low)
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-327 - Use of a Broken or Risky Cryptographic Algorithm
Assigner
References
Impacted products
Vendor Product Version
Paramiko Paramiko Affected: 0 , < a4489456b6f65281e172380cc4826cee5e851dbb (git)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-44405",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-06T12:54:08.285055Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-06T12:54:17.468Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:pypi/paramiko",
          "product": "Paramiko",
          "vendor": "Paramiko",
          "versions": [
            {
              "lessThan": "a4489456b6f65281e172380cc4826cee5e851dbb",
              "status": "affected",
              "version": "0",
              "versionType": "git"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:paramiko:paramiko:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "a4489456b6f65281e172380cc4826cee5e851dbb",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In Paramiko through 4.0.0 before a448945, rsakey.py allows the SHA-1 algorithm."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 3.4,
            "baseSeverity": "LOW",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-327",
              "description": "CWE-327 Use of a Broken or Risky Cryptographic Algorithm",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-05T23:55:03.332Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "url": "https://github.com/paramiko/paramiko/commit/a4489456b6f65281e172380cc4826cee5e851dbb"
        },
        {
          "url": "https://ostif.org/wp-content/uploads/2026/05/25-11-2415-REP_paramiko-security-audit_v1.1.pdf"
        }
      ],
      "x_generator": {
        "engine": "CVE-Request-form 0.0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2026-44405",
    "datePublished": "2026-05-05T23:50:52.811Z",
    "dateReserved": "2026-05-05T23:50:52.416Z",
    "dateUpdated": "2026-05-06T12:54:17.468Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-44405",
      "date": "2026-07-10",
      "epss": "0.00114",
      "percentile": "0.01741"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-44405\",\"sourceIdentifier\":\"cve@mitre.org\",\"published\":\"2026-05-06T00:16:04.883\",\"lastModified\":\"2026-06-17T10:50:35.763\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In Paramiko through 4.0.0 before a448945, rsakey.py allows the SHA-1 algorithm.\"}],\"affected\":[{\"source\":\"cve@mitre.org\",\"affectedData\":[{\"vendor\":\"Paramiko\",\"product\":\"Paramiko\",\"defaultStatus\":\"unaffected\",\"packageURL\":\"pkg:pypi/paramiko\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"a4489456b6f65281e172380cc4826cee5e851dbb\",\"versionType\":\"git\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"cve@mitre.org\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N\",\"baseScore\":3.4,\"baseSeverity\":\"LOW\",\"attackVector\":\"ADJACENT_NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":1.6,\"impactScore\":1.4}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-05-06T12:54:08.285055Z\",\"id\":\"CVE-2026-44405\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"cve@mitre.org\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-327\"}]}],\"references\":[{\"url\":\"https://github.com/paramiko/paramiko/commit/a4489456b6f65281e172380cc4826cee5e851dbb\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://ostif.org/wp-content/uploads/2026/05/25-11-2415-REP_paramiko-security-audit_v1.1.pdf\",\"source\":\"cve@mitre.org\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-07-08T15:30:20+00:00",
      "cve": "CVE-2026-44405",
      "id": "CVE-2026-44405",
      "initial_release_date": "2026-05-05T23:50:52.811000+00:00",
      "product_status:known_affected": "46",
      "product_status:known_not_affected": "1",
      "product_status:under_investigation": "10",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "paramiko: Paramiko: Data integrity could be compromised due to SHA-1 algorithm use",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44405.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-44405\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-05-06T12:54:08.285055Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-05-06T12:54:12.411Z\"}}], \"cna\": {\"metrics\": [{\"format\": \"CVSS\", \"cvssV3_1\": {\"scope\": \"CHANGED\", \"version\": \"3.1\", \"baseScore\": 3.4, \"attackVector\": \"ADJACENT_NETWORK\", \"baseSeverity\": \"LOW\", \"vectorString\": \"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N\", \"integrityImpact\": \"LOW\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"HIGH\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"vendor\": \"Paramiko\", \"product\": \"Paramiko\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"a4489456b6f65281e172380cc4826cee5e851dbb\", \"versionType\": \"git\"}], \"packageURL\": \"pkg:pypi/paramiko\", \"defaultStatus\": \"unaffected\"}], \"references\": [{\"url\": \"https://github.com/paramiko/paramiko/commit/a4489456b6f65281e172380cc4826cee5e851dbb\"}, {\"url\": \"https://ostif.org/wp-content/uploads/2026/05/25-11-2415-REP_paramiko-security-audit_v1.1.pdf\"}], \"x_generator\": {\"engine\": \"CVE-Request-form 0.0.1\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In Paramiko through 4.0.0 before a448945, rsakey.py allows the SHA-1 algorithm.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-327\", \"description\": \"CWE-327 Use of a Broken or Risky Cryptographic Algorithm\"}]}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:a:paramiko:paramiko:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"a4489456b6f65281e172380cc4826cee5e851dbb\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"8254265b-2729-46b6-b9e3-3dfca2d5bfca\", \"shortName\": \"mitre\", \"dateUpdated\": \"2026-05-05T23:55:03.332Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-44405\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-06T12:54:17.468Z\", \"dateReserved\": \"2026-05-05T23:50:52.416Z\", \"assignerOrgId\": \"8254265b-2729-46b6-b9e3-3dfca2d5bfca\", \"datePublished\": \"2026-05-05T23:50:52.811Z\", \"assignerShortName\": \"mitre\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.