Detections
Analytics
Erlang/OTP 19.3 < 26.2.5.21 / 27.0 < 27.3.4.12 / 28.0 < 28.5.0.1 / 29.0 < 29.0.1 DNS nameConstraints Bypass (CVE-2026-42790)
high Nessus Plugin ID 317741
Language:
Synopsis
The remote host is missing a security update.Description
The version of Erlang/OTP installed on the remote host is 19.3 prior to 26.2.5.21, 27.0 prior to 27.3.4.12, 28.0 prior to 28.5.0.1, or 29.0 prior to 29.0.1. It is, therefore, affected by a vulnerability:- Improper Certificate Validation vulnerability in Erlang OTP public_key (pubkey_cert and public_key modules) allows a DNS nameConstraints bypass via subject CommonName fallback in TLS hostname verification. (CVE-2026-42790)
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Upgrade to Erlang/OTP version 26.2.5.21, 27.3.4.12, 28.5.0.1, or 29.0.1 or later.See Also
Plugin Details
Severity: High
ID: 317741
File Name: erlang_otp_CVE-2026-42790.nasl
Version: 1.3
Type: Local
Agent: windows, macosx, unix
Family: Misc.
Published: 5/29/2026
Updated: 6/4/2026
Configuration: Enable thorough checks (optional)
Supported Sensors: Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 6.0
CVSS v2
Risk Factor: High
Base Score: 9.4
Temporal Score: 7
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:N
CVSS Score Source: CVE-2026-42790
CVSS v3
Risk Factor: High
Base Score: 8.1
Temporal Score: 7.1
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
CVSS v4
Risk Factor: High
Base Score: 7.6
Threat Score: 4.9
Threat Vector: CVSS:4.0/E:U
Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Vulnerability Information
CPE: cpe:/a:erlang:erlang%2fotp
Required KB Items: installed_sw/Erlang-OTP
Exploit Ease: No known exploits are available
Patch Publication Date: 5/27/2026
Vulnerability Publication Date: 5/27/2026
Reference Information
CVE: CVE-2026-42790
IAVA: 2026-A-0522