CVE-2026-48860
Fixed in a distro release EPSS <1%CVSS 7.5
Reliance on IP Address for Authentication vulnerability in Erlang/OTP ssl (inet_tls_dist module) allows unauthenticated bypass of the distribution-over-TLS LAN allowlist. The inet_tls_dist:check_ip/1 function, which enforces a LAN allowlist for Erlang distribution over TLS, calls inet:sockname/1 instead of inet:peername/1 to obtain the peer's IP address. Because inet:sockname/1 returns the local socket address, both the local IP and the supposed peer IP resolve to the same value, causing the subnet mask comparison to always succeed regardless of the actual remote address. Any holder of a CA-signed TLS certificate can therefore bypass the LAN restriction and gain full Erlang distribution access to the node, including rpc:call/4 and code:load_binary/3. This vulnerability is associated with program file lib/ssl/src/inet_tls_dist.erl. This issue affects OTP from OTP 26.0 before OTP 27.3.4.13, OTP 28.5.0.2, and OTP 29.0.2, corresponding to ssl from 11.0 before 11.2.12.9, 11.6.0.2, and 11.7.2.
Products: erlang otp
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Debian 12 | erlang | no fix |
| Debian 13 | erlang | 1:27.3.4.1+dfsg-1+deb13u3 |
| Debian 14 | erlang | 1:29.0.2+dfsg-1 |
| Red Hat hummingbird 1 | erlang27 | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-asn1 | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-common_test | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-compiler | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-crypto | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-debugger | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-dialyzer | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-diameter | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-edoc | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-eldap | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-erl_interface | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-erts | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-et | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-eunit | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-examples | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-ftp | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-gdb-tools | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-inets | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-jinterface | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-kernel | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-megaco | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-mnesia | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-observer | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-odbc | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-os_mon | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-parsetools | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-public_key | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-reltool | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-runtime_tools | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-sasl | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-snmp | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-ssh | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-ssl | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-stdlib | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-syntax_tools | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-tftp | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-tools | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-wx | 0:27.3.4.17-1.hum1 |
| Red Hat hummingbird 1 | erlang27-xmerl | 0:27.3.4.17-1.hum1 |
| SUSE Linux Enterprise Module for Server Applications 15 SP7 | erlang26 | 26.2.1-150300.7.28.1 |
| SUSE Linux Enterprise Server 15 SP6-LTSS | erlang26 | 26.2.1-150300.7.28.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | erlang26 | 26.2.1-150300.7.28.1 |
| Ubuntu 22.04 LTS | erlang | 1:24.2.1+dfsg-1ubuntu0.8 |
| Ubuntu 24.04 LTS | erlang | 1:25.3.2.8+dfsg-1ubuntu4.8 |
| Ubuntu 25.10 | erlang | no fix |
| Ubuntu 26.04 LTS | erlang | 1:27.3.4.6+dfsg-1ubuntu0.2 |
| Ubuntu Pro 14.04 LTS | erlang | 1:16.b.3-dfsg-1ubuntu2.2+esm3 |
| Ubuntu Pro 16.04 LTS | erlang | 1:18.3-dfsg-1ubuntu3.1+esm4 |
| Ubuntu Pro 18.04 LTS | erlang | 1:20.2.2+dfsg-1ubuntu2+esm4 |
| Ubuntu Pro 20.04 LTS | erlang | 1:22.2.7+dfsg-1ubuntu0.5+esm3 |
| openSUSE Tumbleweed | erlang | 28.5.0.4-1.1 |
| openSUSE Tumbleweed | erlang27 | 27.1.3-3.1 |