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CVE-2026-48860— Distribution-over-TLS LAN allowlist silently bypassed due to sockname/peername confusion in inet_tls_dist

Quick assessment

Affected
Erlang OTP
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Erlang/OTP是Erlang/OTP开源的一个JavaScript编写的处理处理异常的库。该库可以捕捉node.js内置API引发的异常。 Erlang/OTP ssl 11.0至11.7.2之前版本、11.6.0.2版本和11.2.12.9版本存在安全漏洞，该漏洞源于inet_tls_dist模块中check_ip函数调用inet:sockname/1而非inet:peername/1获取对等方IP地址，导致LAN允许列表检查始终成功，可能导致持有CA签名TLS证书的攻击者绕过LAN限制获得完全E

CVSS 7.5 · High EPSS 0.21% · P10

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 3

VendorProduct Version RangeStatus
Erlang OTP 26.0< * affected
11.0< * affected
7a08c5507862a7011568506d0c17b1fdef30bee4< 0209a6df65d605552b378273027b3968b35f26b4 affected
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I. Basic Information for CVE-2026-48860

Vulnerability Information
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Vulnerability Title
Distribution-over-TLS LAN allowlist silently bypassed due to sockname/peername confusion in inet_tls_dist
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
使用错误要素进行比较
Source: CVE Program / CVE List V5
Vulnerability Title
Erlang/OTP 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Erlang/OTP是Erlang/OTP开源的一个JavaScript编写的处理处理异常的库。该库可以捕捉node.js内置API引发的异常。 Erlang/OTP ssl 11.0至11.7.2之前版本、11.6.0.2版本和11.2.12.9版本存在安全漏洞，该漏洞源于inet_tls_dist模块中check_ip函数调用inet:sockname/1而非inet:peername/1获取对等方IP地址，导致LAN允许列表检查始终成功，可能导致持有CA签名TLS证书的攻击者绕过LAN限制获得完全E
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Erlang OTP 26.0 ~ * cpe:2.3:a:erlang:erlang\/otp:*:*:*:*:*:*:*:*
Erlang OTP 11.0 ~ * cpe:2.3:a:erlang:erlang\/otp:*:*:*:*:*:*:*:*
Erlang OTP 7a08c5507862a7011568506d0c17b1fdef30bee4 ~ 0209a6df65d605552b378273027b3968b35f26b4 cpe:2.3:a:erlang:erlang\/otp:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-48860

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III. Intelligence Information for CVE-2026-48860

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Patches & Fixes for CVE-2026-48860 (1)

Vendor Advisories for CVE-2026-48860 (3)

Same Patch Batch · Erlang · 2026-06-10 · 7 CVEs total

CVE-2026-49759 8.8 HIGH Stack buffer overflow in SCTP error cause parsing in inet_drv allows remote VM crash
CVE-2026-48856 7.1 HIGH httpc leaks Authorization header to cross-origin redirect targets
CVE-2026-49760 6.9 MEDIUM Stack Buffer Overflow in ei_s_print_term at Very Large Integer
CVE-2026-48859 6.3 MEDIUM SSH server timing side-channel in ssh_auth:check_password/3 allows unauthenticated usernam
CVE-2026-48858 6.3 MEDIUM ftp client PASV response IP not validated against control peer, enabling SSRF and FTP boun
CVE-2026-48855 2.3 LOW SFTP READLINK Leaks Absolute Backend Filesystem Path When Root Is Configured

IV. Related Vulnerabilities

Same product: OTP
Same vendor: Erlang
Same weakness: CWE-1025

V. Comments for CVE-2026-48860

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