7.5

CVE-2026-48860

Distribution-over-TLS LAN allowlist silently bypassed due to sockname/peername confusion in inet_tls_dist

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 29.0.2, 28.5.0.2 and 27.3.4.13 corresponding to ssl from 11.0 before 11.7.2, 11.6.0.2 and 11.2.12.9.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Erlang ≫ Erlang/otp Version >= 26.0 < 27.3.4.13
Erlang ≫ Erlang/ssl Version >= 11.0 < 11.2.12.9
Erlang ≫ Erlang/ssl Version >= 11.6 < 11.6.0.2
Erlang ≫ Erlang/ssl Version >= 11.7 < 11.7.2
VulnDex Vulnerability Enrichment
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EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.19% 0.092
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 6.5 2.8 3.6
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
6b3ad84c-e1a6-4bf7-a703-f496b71e49db 7.5 0 0
CVSS:4.0/AV:A/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CWE-1025 Comparison Using Wrong Factors

The code performs a comparison between two entities, but the comparison examines the wrong factors or characteristics of the entities, which can lead to incorrect results and resultant weaknesses.

CWE-863 Incorrect Authorization

The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

https://www.erlang.org/doc/system/versions.html#order-of-versions
Product
https://github.com/erlang/otp/security/advisories/GHSA-gp7x-mfv6-52cv
Vendor Advisory
https://cna.erlef.org/cves/CVE-2026-48860.html
Third Party Advisory
https://osv.dev/vulnerability/EEF-CVE-2026-48860
Third Party Advisory
https://github.com/erlang/otp/commit/0209a6df65d605552b378273027b3968b35f26b4
Patch