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CVE-2026-48858

Fixed in a distro release EPSS <1%CVSS 6.3

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.

Published 2026-06-10 · CVE record · OSV

Products: erlang otp

Distro releases

ReleasePackageFixed in
Debian 12erlangno fix
Debian 13erlang1:27.3.4.1+dfsg-1+deb13u3
Debian 14erlang1:29.0.2+dfsg-1
Red Hat hummingbird 1erlang270:27.3.4.17-1.hum1
Red Hat hummingbird 1erlang27-asn10:27.3.4.17-1.hum1
Red Hat hummingbird 1erlang27-common_test0:27.3.4.17-1.hum1
Red Hat hummingbird 1erlang27-compiler0:27.3.4.17-1.hum1
Red Hat hummingbird 1erlang27-crypto0:27.3.4.17-1.hum1
Red Hat hummingbird 1erlang27-debugger0:27.3.4.17-1.hum1
Red Hat hummingbird 1erlang27-dialyzer0:27.3.4.17-1.hum1
Red Hat hummingbird 1erlang27-diameter0:27.3.4.17-1.hum1
Red Hat hummingbird 1erlang27-edoc0:27.3.4.17-1.hum1
Red Hat hummingbird 1erlang27-eldap0:27.3.4.17-1.hum1
Red Hat hummingbird 1erlang27-erl_interface0:27.3.4.17-1.hum1
Red Hat hummingbird 1erlang27-erts0:27.3.4.17-1.hum1
Red Hat hummingbird 1erlang27-et0:27.3.4.17-1.hum1
Red Hat hummingbird 1erlang27-eunit0:27.3.4.17-1.hum1
Red Hat hummingbird 1erlang27-examples0:27.3.4.17-1.hum1
Red Hat hummingbird 1erlang27-ftp0:27.3.4.17-1.hum1
Red Hat hummingbird 1erlang27-gdb-tools0:27.3.4.17-1.hum1
Red Hat hummingbird 1erlang27-inets0:27.3.4.17-1.hum1
Red Hat hummingbird 1erlang27-jinterface0:27.3.4.17-1.hum1
Red Hat hummingbird 1erlang27-kernel0:27.3.4.17-1.hum1
Red Hat hummingbird 1erlang27-megaco0:27.3.4.17-1.hum1
Red Hat hummingbird 1erlang27-mnesia0:27.3.4.17-1.hum1
Red Hat hummingbird 1erlang27-observer0:27.3.4.17-1.hum1
Red Hat hummingbird 1erlang27-odbc0:27.3.4.17-1.hum1
Red Hat hummingbird 1erlang27-os_mon0:27.3.4.17-1.hum1
Red Hat hummingbird 1erlang27-parsetools0:27.3.4.17-1.hum1
Red Hat hummingbird 1erlang27-public_key0:27.3.4.17-1.hum1
Red Hat hummingbird 1erlang27-reltool0:27.3.4.17-1.hum1
Red Hat hummingbird 1erlang27-runtime_tools0:27.3.4.17-1.hum1
Red Hat hummingbird 1erlang27-sasl0:27.3.4.17-1.hum1
Red Hat hummingbird 1erlang27-snmp0:27.3.4.17-1.hum1
Red Hat hummingbird 1erlang27-ssh0:27.3.4.17-1.hum1
Red Hat hummingbird 1erlang27-ssl0:27.3.4.17-1.hum1
Red Hat hummingbird 1erlang27-stdlib0:27.3.4.17-1.hum1
Red Hat hummingbird 1erlang27-syntax_tools0:27.3.4.17-1.hum1
Red Hat hummingbird 1erlang27-tftp0:27.3.4.17-1.hum1
Red Hat hummingbird 1erlang27-tools0:27.3.4.17-1.hum1
Red Hat hummingbird 1erlang27-wx0:27.3.4.17-1.hum1
Red Hat hummingbird 1erlang27-xmerl0:27.3.4.17-1.hum1
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOSerlang23.3.4.19-150300.3.39.1
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSSerlang23.3.4.19-150300.3.39.1
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOSerlang23.3.4.19-150300.3.39.1
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSSerlang23.3.4.19-150300.3.39.1
SUSE Linux Enterprise Module for Server Applications 15 SP7erlang23.3.4.19-150300.3.39.1
SUSE Linux Enterprise Module for Server Applications 15 SP7erlang2626.2.1-150300.7.28.1
SUSE Linux Enterprise Server 15 SP4-LTSSerlang23.3.4.19-150300.3.39.1
SUSE Linux Enterprise Server 15 SP5-LTSSerlang23.3.4.19-150300.3.39.1
SUSE Linux Enterprise Server 15 SP6-LTSSerlang23.3.4.19-150300.3.39.1
SUSE Linux Enterprise Server 15 SP6-LTSSerlang2626.2.1-150300.7.28.1
SUSE Linux Enterprise Server for SAP Applications 15 SP4erlang23.3.4.19-150300.3.39.1
SUSE Linux Enterprise Server for SAP Applications 15 SP5erlang23.3.4.19-150300.3.39.1
SUSE Linux Enterprise Server for SAP Applications 15 SP6erlang23.3.4.19-150300.3.39.1
SUSE Linux Enterprise Server for SAP Applications 15 SP6erlang2626.2.1-150300.7.28.1
Ubuntu 22.04 LTSerlang1:24.2.1+dfsg-1ubuntu0.8
Ubuntu 24.04 LTSerlang1:25.3.2.8+dfsg-1ubuntu4.8
Ubuntu 25.10erlangno fix
Ubuntu 26.04 LTSerlang1:27.3.4.6+dfsg-1ubuntu0.2
Ubuntu Pro 14.04 LTSerlang1:16.b.3-dfsg-1ubuntu2.2+esm3
Ubuntu Pro 16.04 LTSerlang1:18.3-dfsg-1ubuntu3.1+esm4
Ubuntu Pro 18.04 LTSerlang1:20.2.2+dfsg-1ubuntu2+esm4
Ubuntu Pro 20.04 LTSerlang1:22.2.7+dfsg-1ubuntu0.5+esm3
openSUSE Tumbleweederlang28.5.0.4-1.1
openSUSE Tumbleweederlang2727.1.3-3.1