Erlang/OTP 17.0 < 27.3.4.18 / 28.0 < 28.5.0.7 / 29.0 < 29.1.1 ASN.1 OBJECT IDENTIFIER Decoder DoS (CVE-2026-65634)

high Nessus Plugin ID 350081

Synopsis

The remote host is missing a security update.

Description

The version of Erlang/OTP installed on the remote host is 17.0 prior to 27.3.4.18, 28.0 prior to 28.5.0.7, or 29.0 prior to 29.1.1. It is, therefore, affected by a vulnerability:

- Inefficient algorithmic complexity in the Erlang/OTP asn1 OBJECT IDENTIFIER decoder allows a remote unauthenticated attacker to cause denial of service by sending a crafted OID during the TLS handshake. The BER and PER subidentifier decoders accumulate a base-128 subidentifier into an unbounded integer, giving quadratic total work in the size of a single subidentifier. The vulnerable decoder is generated into every ASN.1 module containing an OBJECT IDENTIFIER, including OTP-PUB-KEY, which is reached during X.509 certificate parsing before any signature or trust chain verification. (CVE-2026-65634)

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 27.3.4.18, 28.5.0.7, or 29.1.1 or later.

Plugin Details

Severity: High

ID: 350081

File Name: erlang_otp_CVE-2026-65634.nasl

Version: 1.2

Type: Local

Agent: windows, macosx, unix

Family: Misc.

Published: 9/25/2026

Updated: 9/25/2026

Configuration: Enable thorough checks (optional)

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.61

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:P

CVSS Score Source: CVE-2026-65634

CVSS v3

Risk Factor: High

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v4

Risk Factor: High

Base Score: 8.2

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Vulnerability Information

CPE: cpe:/a:erlang:erlang%2fotp

Required KB Items: installed_sw/Erlang-OTP

Patch Publication Date: 9/22/2026

Vulnerability Publication Date: 9/22/2026

Reference Information

CVE: CVE-2026-65634

IAVA: 2026-A-1041

Detections

Analytics