The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Improper Handling of Case Sensitivity vulnerability in Erlang/OTP inets httpd allows a remote     unauthenticated attacker to read files inside a mod_auth protected directory by requesting them with     different casing, on deployments whose filesystem is case-insensitive. mod_auth:secret_path/3 decides     whether a resolved filesystem path lies inside a protected directory block by running the configured     directory path through re:run/3 without the caseless option. A request for /secret/file against a     directory configured as /Secret therefore does not match, so the request is treated as unprotected and no     authentication challenge is issued, while the filesystem resolves the differently cased path to the same     file and mod_get serves it. Deployments on case-sensitive filesystems are unaffected, because there the     filesystem itself rejects the mismatched casing. This issue affects OTP from OTP 17.0 before OTP     27.3.4.17, from OTP 28.0 before OTP 28.5.0.6, and from OTP 29.0 before OTP 29.0.6, corresponding to inets     from 5.10 before 9.3.2.7, from 9.4 before 9.6.2.3, and from 9.7 before 9.7.2. Whether OTP before OTP 17.0,     corresponding to inets before 5.10, is affected is unknown. (CVE-2026-73270)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote Debian 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6580 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6580-1                   security@debian.org     https://www.debian.org/security/                                  Aron Xu     October 23, 2026                      https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : erlang     CVE ID         : CVE-2026-55951 CVE-2026-59696 CVE-2026-65634 CVE-2026-66357                      CVE-2026-66835 CVE-2026-68956 CVE-2026-69664 CVE-2026-70399                      CVE-2026-70405 CVE-2026-70409 CVE-2026-71380 CVE-2026-73270                      CVE-2026-73276 CVE-2026-73812 CVE-2026-74835 CVE-2026-74994                      CVE-2026-75538 CVE-2026-89422

    Several vulnerabilities were discovered in Erlang/OTP, a programming     language and runtime environment. These issues could result in denial of     service, HTTP request smuggling, or bypass of authentication and access     restrictions, including TLS server impersonation.

    The affected components include the HTTP client and server, SSH, TLS,     ASN.1 decoding, the network driver, and URI, LDAP and SNMP parsing. The     update tightens protocol validation and HTTP/SSH resource limits.
    Applications relying on previously permissive behavior may need     adjustment.

    For the stable distribution (trixie), these problems have been fixed in     version 1:27.3.4.1+dfsg-1+deb13u4.

    We recommend that you upgrade your erlang packages.

    For the detailed security status of erlang please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/erlang

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8827-1 advisory.

    It was discovered that the Erlang Port Mapper Daemon did not properly handle slow connections. A remote     attacker could possibly use this issue to cause a denial of service. (CVE-2026-42792)

    It was discovered that Erlang incorrectly handled certain external term format data, leading to heap     corruption. An attacker could possibly use this issue to cause Erlang to crash, resulting in a denial of     service. This issue only affected Ubuntu 24.04 LTS and Ubuntu 26.04 LTS. (CVE-2026-55737)

    It was discovered that Erlang incorrectly handled invalid external term format data. An attacker could     possibly use this issue to cause Erlang to crash, resulting in a denial of service. This issue only     affected Ubuntu 26.04 LTS. (CVE-2026-54890)

    It was discovered that Erlang incorrectly handled certain packet lengths, leading to a buffer overflow. A     remote attacker could possibly use this issue to cause Erlang to crash or execute arbitrary code.
    (CVE-2026-75538)

    It was discovered that the Erlang Megaco flex scanner incorrectly handled certain input, leading to a     buffer overflow. A remote attacker could possibly use this issue to cause Erlang to crash or execute     arbitrary code. (CVE-2026-59250)

    It was discovered that Erlang TLS clients incorrectly accepted cipher suites that they had not offered. A     remote attacker could possibly use this issue to intercept and modify TLS communications. (CVE-2026-55953)

    It was discovered that Erlang incorrectly handled certain certificate chains. A remote attacker could     possibly use this issue to cause Erlang to use excessive resources, leading to a denial of service. This     issue only affected Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-58227)

    It was discovered that Erlang incorrectly handled certain certificate policies. A remote attacker could     possibly use this issue to cause Erlang to use excessive resources, leading to a denial of service. This     issue only affected Ubuntu 26.04 LTS. (CVE-2026-59251)

    It was discovered that the Erlang HTTP server incorrectly handled certain conflicting HTTP framing     headers. A remote attacker could possibly use this issue to smuggle HTTP requests. (CVE-2026-23941,     CVE-2026-73812)

    It was discovered that the Erlang HTTP server incorrectly handled certain malformed chunk sizes. A remote     attacker could possibly use this issue to cause Erlang to crash, resulting in a denial of service.
    (CVE-2026-69664)

    It was discovered that the Erlang HTTP server did not properly limit the size of chunked request bodies. A     remote attacker could possibly use this issue to cause Erlang to use excessive resources, leading to a     denial of service. (CVE-2026-74835)

    It was discovered that the Erlang HTTP server incorrectly handled certain equivalent request paths and     differences in character case. A remote attacker could possibly use this issue to bypass authentication     and gain unauthorized access. (CVE-2026-66835, CVE-2026-73270)

    It was discovered that the Erlang HTTP server did not properly limit simultaneous connections. A remote     attacker could possibly use this issue to cause Erlang to use excessive resources, leading to a denial of     service. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS,     Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-70399)

    It was discovered that the Erlang HTTP server incorrectly handled header continuation lines. A remote     attacker could possibly use this issue to smuggle HTTP requests. (CVE-2026-66357)

    It was discovered that the Erlang HTTP server incorrectly handled certain malformed header names. A remote     attacker could possibly use this issue to smuggle HTTP requests. This issue only affected Ubuntu 20.04     LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-73276)

    It was discovered that the Erlang HTTP server incorrectly handled incomplete request bodies. A remote     attacker could possibly use this issue to cause Erlang to use excessive resources, leading to a denial of     service. (CVE-2026-71380)

    It was discovered that the Erlang HTTP client did not properly limit the size of HTTP response headers. A     malicious HTTP server could possibly use this issue to cause Erlang to use excessive resources, leading to     a denial of service. (CVE-2026-55951)

    It was discovered that Erlang did not properly limit the length of port numbers when parsing URIs. A     remote attacker could possibly use this issue to cause Erlang to use excessive resources, leading to a     denial of service. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and     Ubuntu 26.04 LTS. (CVE-2026-59696)

    It was discovered that the Erlang SNMP application did not properly limit the size of certain integer     values. A remote attacker could possibly use this issue to cause Erlang to use excessive resources,     leading to a denial of service. (CVE-2026-70405)

    It was discovered that the Erlang LDAP client did not properly limit the length of port numbers in     referral URLs. A malicious LDAP server could possibly use this issue to cause Erlang to use excessive     resources, leading to a denial of service. (CVE-2026-70409)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the e9dfc357-a63f-11f1-9195-4c526214c986 advisory.

    The Erlang/OTP project reports:
    OTP 29.0.6, 28.5.0.6 and 27.3.4.17 fix the following               issues, most of them in the inets httpd and httpc               implementations:

Tenable has extracted the preceding description block directly from the FreeBSD security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Published	Updated	Severity
342494	Linux Distros Unpatched Vulnerability : CVE-2026-73270	Nessus	Misc.	9/3/2026	10/23/2026	high
371200	Debian dsa-6580 : erlang - security update	Nessus	Debian Local Security Checks	10/23/2026	10/23/2026	critical
350965	Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS : Erlang vulnerabilities (USN-8827-1)	Nessus	Ubuntu Local Security Checks	9/29/2026	9/29/2026	critical
342490	FreeBSD : Erlang/OTP -- multiple vulnerabilities in inets, stdlib, snmp and eldap (e9dfc357-a63f-11f1-9195-4c526214c986)	Nessus	FreeBSD Local Security Checks	9/3/2026	9/4/2026	high

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