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    2 vulnerabilities found for ftp by erlang

    CVE-2026-48858 (GCVE-0-2026-48858)

    Vulnerability from nvd – Published: 2026-06-10 14:35 – Updated: 2026-07-24 14:16
    VLAI
    Title
    ftp client PASV response IP not validated against control peer, enabling SSRF and FTP bounce attacks
    Summary
    Server-Side Request Forgery (SSRF) vulnerability in Erlang/OTP ftp (ftp_internal module) allows FTP bounce attacks and SSRF via an unvalidated PASV response IP address. The ftp_internal:handle_ctrl_result/2 PASV handler (mode=passive, ipfamily=inet, ftp_extension=false) extracts the IP address from the server's 227 response and passes it directly to gen_tcp:connect/4 without validating it against the control connection peer address. The adjacent EPSV handlers correctly call peername(CSock) to derive the IP from the control connection, but the PASV handler does not. A malicious or compromised FTP server can redirect the client's data connection to an arbitrary internal host and port. On read operations (ftp:ls/1,2, ftp:nlist/1,2, ftp:recv/2,3), data from the redirected target is returned to the caller. On write operations (ftp:send/2,3, ftp:append/2,3), file content is sent to the redirected target. This enables SSRF against internal hosts, cloud metadata endpoints, and FTP bounce attacks against third-party hosts. The vulnerable path is the default configuration (mode=passive, ipfamily=inet, ftp_extension=false). RFC 2577 section 3 explicitly recommends validating the PASV response IP against the control connection peer. The ftp application is deprecated and scheduled for removal in OTP-30. This vulnerability is associated with program files lib/inets/src/ftp/ftp_internal.erl (inets 5.10.4 through 6.5, OTP 17.4 through 20.3) and lib/ftp/src/ftp_internal.erl (ftp 1.0 and later, OTP 21.0 and later). This issue affects OTP from OTP 17.4 before OTP 29.0.2, OTP 28.5.0.2 and OTP 27.3.4.13, corresponding to inets from 5.10.4 before 7.0 and ftp from 1.0 before 1.2.6, 1.2.4.1 and 1.2.3.1.
    Severity
    6.3 (Medium)
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-06-10 16:20 UTC
    CWE
    • CWE-918 - Server-Side Request Forgery (SSRF)
    Assigner
    EEF
    References
    Impacted products
    Vendor Product Version
    Erlang OTP Affected: 5.10.4 , < 7.0 (otp)
        cpe:2.3:a:erlang:erlang\/otp:*:*:*:*:*:*:*:*
    		 Create a notification for this product.
    Erlang OTP Affected: 1.0 , < * (otp)
        cpe:2.3:a:erlang:erlang\/otp:*:*:*:*:*:*:*:*
    		 Create a notification for this product.
    Erlang OTP Affected: 17.4 , < * (otp)
    Affected: be95772ee1fcfe71045ef070130bea7a910b81e3 , < * (git)
        cpe:2.3:a:erlang:erlang\/otp:*:*:*:*:*:*:*:*
    		 Create a notification for this product.
    Credits
    Jonatan Männchen / EEF Jonatan Männchen / EEF Ingela Anderton Andin
    Show details on NVD website
    To clipboard 

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    CVE-2026-48858 (GCVE-0-2026-48858)

    Vulnerability from cvelistv5 – Published: 2026-06-10 14:35 – Updated: 2026-07-24 14:16
    VLAI
    Title
    ftp client PASV response IP not validated against control peer, enabling SSRF and FTP bounce attacks
    Summary
    Server-Side Request Forgery (SSRF) vulnerability in Erlang/OTP ftp (ftp_internal module) allows FTP bounce attacks and SSRF via an unvalidated PASV response IP address. The ftp_internal:handle_ctrl_result/2 PASV handler (mode=passive, ipfamily=inet, ftp_extension=false) extracts the IP address from the server's 227 response and passes it directly to gen_tcp:connect/4 without validating it against the control connection peer address. The adjacent EPSV handlers correctly call peername(CSock) to derive the IP from the control connection, but the PASV handler does not. A malicious or compromised FTP server can redirect the client's data connection to an arbitrary internal host and port. On read operations (ftp:ls/1,2, ftp:nlist/1,2, ftp:recv/2,3), data from the redirected target is returned to the caller. On write operations (ftp:send/2,3, ftp:append/2,3), file content is sent to the redirected target. This enables SSRF against internal hosts, cloud metadata endpoints, and FTP bounce attacks against third-party hosts. The vulnerable path is the default configuration (mode=passive, ipfamily=inet, ftp_extension=false). RFC 2577 section 3 explicitly recommends validating the PASV response IP against the control connection peer. The ftp application is deprecated and scheduled for removal in OTP-30. This vulnerability is associated with program files lib/inets/src/ftp/ftp_internal.erl (inets 5.10.4 through 6.5, OTP 17.4 through 20.3) and lib/ftp/src/ftp_internal.erl (ftp 1.0 and later, OTP 21.0 and later). This issue affects OTP from OTP 17.4 before OTP 29.0.2, OTP 28.5.0.2 and OTP 27.3.4.13, corresponding to inets from 5.10.4 before 7.0 and ftp from 1.0 before 1.2.6, 1.2.4.1 and 1.2.3.1.
    Severity
    6.3 (Medium)
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator · CISA-ADP (v2.0.3)
    Decision recorded 2026-06-10 16:20 UTC
    CWE
    • CWE-918 - Server-Side Request Forgery (SSRF)
    Assigner
    EEF
    References
    Impacted products
    Vendor Product Version
    Erlang OTP Affected: 5.10.4 , < 7.0 (otp)
        cpe:2.3:a:erlang:erlang\/otp:*:*:*:*:*:*:*:*
    		 Create a notification for this product.
    Erlang OTP Affected: 1.0 , < * (otp)
        cpe:2.3:a:erlang:erlang\/otp:*:*:*:*:*:*:*:*
    		 Create a notification for this product.
    Erlang OTP Affected: 17.4 , < * (otp)
    Affected: be95772ee1fcfe71045ef070130bea7a910b81e3 , < * (git)
        cpe:2.3:a:erlang:erlang\/otp:*:*:*:*:*:*:*:*
    		 Create a notification for this product.
    Credits
    Jonatan Männchen / EEF Jonatan Männchen / EEF Ingela Anderton Andin
    Show details on NVD website
    To clipboard 

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          "modules": [
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          "packageURL": "pkg:otp/ftp?repository_url=https:%2F%2Fgithub.com%2Ferlang%2Fotp\u0026vcs_url=git%20https:%2F%2Fgithub.com%2Ferlang%2Fotp.git",
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          "vendor": "Erlang",
          "versions": [
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                  "status": "unaffected"
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              "value": "The vulnerable path is active under the default configuration: \u003ctt\u003emode=passive\u003c/tt\u003e, \u003ctt\u003eipfamily=inet\u003c/tt\u003e, and \u003ctt\u003eftp_extension=false\u003c/tt\u003e are all defaults for \u003ctt\u003eftp:open/2\u003c/tt\u003e."
            }
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          "value": "The vulnerable path is active under the default configuration: mode=passive, ipfamily=inet, and ftp_extension=false are all defaults for ftp:open/2."
        }
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                  "vulnerable": true
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                {
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      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Jonatan M\u00e4nnchen / EEF"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Jonatan M\u00e4nnchen / EEF"
        },
        {
          "lang": "en",
          "type": "remediation reviewer",
          "value": "Ingela Anderton Andin"
        }
      ],
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          "lang": "en",
          "supportingMedia": [
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              "value": "\u003cp\u003eServer-Side Request Forgery (SSRF) vulnerability in Erlang/OTP ftp (ftp_internal module) allows FTP bounce attacks and SSRF via an unvalidated PASV response IP address.\u003c/p\u003e\u003cp\u003eThe \u003ctt\u003eftp_internal:handle_ctrl_result/2\u003c/tt\u003e PASV handler (mode=passive, ipfamily=inet, ftp_extension=false) extracts the IP address from the server\u0027s 227 response and passes it directly to \u003ctt\u003egen_tcp:connect/4\u003c/tt\u003e without validating it against the control connection peer address. The adjacent EPSV handlers correctly call \u003ctt\u003epeername(CSock)\u003c/tt\u003e to derive the IP from the control connection, but the PASV handler does not. A malicious or compromised FTP server can redirect the client\u0027s data connection to an arbitrary internal host and port. On read operations (\u003ctt\u003eftp:ls/1,2\u003c/tt\u003e, \u003ctt\u003eftp:nlist/1,2\u003c/tt\u003e, \u003ctt\u003eftp:recv/2,3\u003c/tt\u003e), data from the redirected target is returned to the caller. On write operations (\u003ctt\u003eftp:send/2,3\u003c/tt\u003e, \u003ctt\u003eftp:append/2,3\u003c/tt\u003e), file content is sent to the redirected target. This enables SSRF against internal hosts, cloud metadata endpoints, and FTP bounce attacks against third-party hosts.\u003c/p\u003e\u003cp\u003eThe vulnerable path is the default configuration (mode=passive, ipfamily=inet, ftp_extension=false). RFC 2577 section 3 explicitly recommends validating the PASV response IP against the control connection peer.\u003c/p\u003e\u003cp\u003eThe \u003ctt\u003eftp\u003c/tt\u003e application is deprecated and scheduled for removal in OTP-30.\u003c/p\u003e\u003cp\u003eThis vulnerability is associated with program files \u003ctt\u003elib/inets/src/ftp/ftp_internal.erl\u003c/tt\u003e (inets 5.10.4 through 6.5, OTP\u0026nbsp;17.4 through 20.3) and \u003ctt\u003elib/ftp/src/ftp_internal.erl\u003c/tt\u003e (ftp 1.0 and later, OTP\u0026nbsp;21.0 and later).\u003c/p\u003e\u003cp\u003eThis issue affects OTP from OTP 17.4 before OTP\u0026nbsp;29.0.2, OTP\u0026nbsp;28.5.0.2 and OTP\u0026nbsp;27.3.4.13, corresponding to inets from 5.10.4 before 7.0 and ftp from 1.0 before 1.2.6, 1.2.4.1 and 1.2.3.1.\u003c/p\u003e"
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          "value": "Server-Side Request Forgery (SSRF) vulnerability in Erlang/OTP ftp (ftp_internal module) allows FTP bounce attacks and SSRF via an unvalidated PASV response IP address.\n\nThe ftp_internal:handle_ctrl_result/2 PASV handler (mode=passive, ipfamily=inet, ftp_extension=false) extracts the IP address from the server\u0027s 227 response and passes it directly to gen_tcp:connect/4 without validating it against the control connection peer address. The adjacent EPSV handlers correctly call peername(CSock) to derive the IP from the control connection, but the PASV handler does not. A malicious or compromised FTP server can redirect the client\u0027s data connection to an arbitrary internal host and port. On read operations (ftp:ls/1,2, ftp:nlist/1,2, ftp:recv/2,3), data from the redirected target is returned to the caller. On write operations (ftp:send/2,3, ftp:append/2,3), file content is sent to the redirected target. This enables SSRF against internal hosts, cloud metadata endpoints, and FTP bounce attacks against third-party hosts.\n\nThe vulnerable path is the default configuration (mode=passive, ipfamily=inet, ftp_extension=false). RFC 2577 section 3 explicitly recommends validating the PASV response IP against the control connection peer.\n\nThe ftp application is deprecated and scheduled for removal in OTP-30.\n\nThis vulnerability is associated with program files lib/inets/src/ftp/ftp_internal.erl (inets 5.10.4 through 6.5, OTP\u00a017.4 through 20.3) and lib/ftp/src/ftp_internal.erl (ftp 1.0 and later, OTP\u00a021.0 and later).\n\nThis issue affects OTP from OTP 17.4 before OTP\u00a029.0.2, OTP\u00a028.5.0.2 and OTP\u00a027.3.4.13, corresponding to inets from 5.10.4 before 7.0 and ftp from 1.0 before 1.2.6, 1.2.4.1 and 1.2.3.1."
        }
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          "capecId": "CAPEC-664",
          "descriptions": [
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              "value": "CAPEC-664 Server Side Request Forgery"
            }
          ]
        }
      ],
      "metrics": [
        {
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            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 6.3,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "LOW",
            "subIntegrityImpact": "LOW",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "LOW",
            "vulnIntegrityImpact": "LOW"
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          "format": "CVSS",
          "scenarios": [
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              "value": "GENERAL"
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            {
              "cweId": "CWE-918",
              "description": "CWE-918 Server-Side Request Forgery (SSRF)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
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        "dateUpdated": "2026-07-24T14:16:02.204Z",
        "orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
        "shortName": "EEF"
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          "url": "https://github.com/erlang/otp/security/advisories/GHSA-24cv-hwgr-37fq"
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          "url": "https://cna.erlef.org/cves/CVE-2026-48858.html"
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          "url": "https://osv.dev/vulnerability/EEF-CVE-2026-48858"
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          "url": "https://www.erlang.org/doc/system/versions.html#order-of-versions"
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          "url": "https://github.com/erlang/otp/commit/2691a806231ffd0490a8a9e20500dec0c7e73727"
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      "source": {
        "discovery": "INTERNAL"
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      "title": "ftp client PASV response IP not validated against control peer, enabling SSRF and FTP bounce attacks",
      "workarounds": [
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              "value": "Pass \u003ctt\u003e{ftp_extension, true}\u003c/tt\u003e to \u003ctt\u003eftp:open/2\u003c/tt\u003e to use EPSV instead of PASV. Alternatively, pass \u003ctt\u003e{mode, active}\u003c/tt\u003e to use active mode, or pass \u003ctt\u003e{ipfamily, inet6}\u003c/tt\u003e to force IPv6, both of which bypass the vulnerable PASV path."
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        }
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    "assignerShortName": "EEF",
    "cveId": "CVE-2026-48858",
    "datePublished": "2026-06-10T14:35:45.466Z",
    "dateReserved": "2026-05-25T20:44:10.697Z",
    "dateUpdated": "2026-07-24T14:16:02.204Z",
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