The remote RockyLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:33515 advisory.

    * ruby: net-imap: Net::IMAP: Denial of Service via crafted IMAP responses (CVE-2026-42245)

    * ruby/net-imap: ruby: Net::IMAP: IMAP Command Injection via Symbol Arguments (CVE-2026-42258)

    * net-imap: ruby: Net::IMAP: Information disclosure via man-in-the-middle attack bypassing TLS     (CVE-2026-42246)

Tenable has extracted the preceding description block directly from the RockyLinux 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 RockyLinux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:33540 advisory.

    * ruby: net-imap: Net::IMAP: Denial of Service via crafted IMAP responses (CVE-2026-42245)

    * ruby/net-imap: ruby: Net::IMAP: IMAP Command Injection via Symbol Arguments (CVE-2026-42258)

    * net-imap: ruby: Net::IMAP: Information disclosure via man-in-the-middle attack bypassing TLS     (CVE-2026-42246)

Tenable has extracted the preceding description block directly from the RockyLinux 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 Oracle Linux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-33540 advisory.

    - Fix Net::IMAP ResponseReader quadratic complexity vulnerability (CVE-2026-42245)       Includes core fix plus additional performance optimizations       Resolves: RHEL-181675
    - Fix Net::IMAP STARTTLS stripping vulnerability (CVE-2026-42246)       Resolves: RHEL-181767
    - Fix Net::IMAP command injection vulnerability via unvalidated Symbol arguments (CVE-2026-42258)       Resolves: RHEL-181793
    - Fix ERB: Arbitrary code execution via bypass      (CVE-2026-41316)       Resolves: RHEL-170910

Tenable has extracted the preceding description block directly from the Oracle Linux 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 Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:36099 advisory.

    Ruby is an extensible, interpreted, object-oriented, scripting language. It has features to process text     files and to perform system management tasks.

    Security Fix(es):

    * ruby: net-imap: Net::IMAP: Denial of Service via crafted IMAP responses (CVE-2026-42245)

    * ruby/net-imap: ruby: Net::IMAP: IMAP Command Injection via Symbol Arguments (CVE-2026-42258)

    * net-imap: ruby: Net::IMAP: Information disclosure via man-in-the-middle attack bypassing TLS     (CVE-2026-42246)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux 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 Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-7b7c2b373e advisory.

    Ruby 3.4.10 is released. This new version contains severay security bug fixes in zlib, net-imap and erb..

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

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

According to the versions of the ruby packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

    Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to     versions 0.4.24, 0.5.14, and 0.6.4, Net::IMAP::ResponseReader has quadratic time complexity when reading     large responses containing many string literals. A hostile server can send responses which are crafted to     exhaust the client's CPU for a denial of service attack. This issue has been patched in versions 0.4.24,     0.5.14, and 0.6.4.(CVE-2026-42245)

    Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to     versions 0.3.10, 0.4.24, 0.5.14, and 0.6.4, a man-in-the-middle attacker can cause Net::IMAP#starttls to     return 'successfully', without starting TLS. This issue has been patched in versions 0.3.10, 0.4.24,     0.5.14, and 0.6.4.(CVE-2026-42246)

    Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to     versions 0.4.24, 0.5.14, and 0.6.4, symbol arguments to commands are vulnerable to a CRLF Injection / IMAP     Command injection via Symbol arguments passed to IMAP commands. This issue has been patched in versions     0.4.24, 0.5.14, and 0.6.4.(CVE-2026-42258)

    Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to     versions 0.4.24, 0.5.14, and 0.6.4, several Net::IMAP commands accept a raw string argument that is sent     to the server without validation or escaping. If this string is derived from user-controlled input, it may     contain contain CRLF sequences, which an attacker can use to inject arbitrary IMAP commands. This issue     has been patched in versions 0.4.24, 0.5.14, and 0.6.4.(CVE-2026-42257)

    ERB is a templating system for Ruby. Ruby 2.7.0 (before ERB 2.2.0 was published on rubygems.org)     introduced an `@_init` instance variable guard in `ERB#result` and `ERB#run` to prevent code execution     when an ERB object is reconstructed via `Marshal.load` (deserialization). However, three other public     methods that also evaluate `@src` via `eval()` were not given the same guard: `ERB#def_method`,     `ERB#def_module`, and `ERB#def_class`. An attacker who can trigger `Marshal.load` on untrusted data in a     Ruby application that has `erb` loaded can use `ERB#def_module` (zero-arg, default parameters) as a code     execution sink, bypassing the `@_init` protection entirely. ERB 4.0.3.1, 4.0.4.1, 6.0.1.1, and 6.0.4 patch     the issue.(CVE-2026-41316)

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

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

According to the versions of the ruby packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

    ERB is a templating system for Ruby. Ruby 2.7.0 (before ERB 2.2.0 was published on rubygems.org)     introduced an `@_init` instance variable guard in `ERB#result` and `ERB#run` to prevent code execution     when an ERB object is reconstructed via `Marshal.load` (deserialization). However, three other public     methods that also evaluate `@src` via `eval()` were not given the same guard: `ERB#def_method`,     `ERB#def_module`, and `ERB#def_class`. An attacker who can trigger `Marshal.load` on untrusted data in a     Ruby application that has `erb` loaded can use `ERB#def_module` (zero-arg, default parameters) as a code     execution sink, bypassing the `@_init` protection entirely. ERB 4.0.3.1, 4.0.4.1, 6.0.1.1, and 6.0.4 patch     the issue.(CVE-2026-41316)

    Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to     versions 0.4.24, 0.5.14, and 0.6.4, symbol arguments to commands are vulnerable to a CRLF Injection / IMAP     Command injection via Symbol arguments passed to IMAP commands. This issue has been patched in versions     0.4.24, 0.5.14, and 0.6.4.(CVE-2026-42258)

    Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to     versions 0.4.24, 0.5.14, and 0.6.4, several Net::IMAP commands accept a raw string argument that is sent     to the server without validation or escaping. If this string is derived from user-controlled input, it may     contain contain CRLF sequences, which an attacker can use to inject arbitrary IMAP commands. This issue     has been patched in versions 0.4.24, 0.5.14, and 0.6.4.(CVE-2026-42257)

    Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to     versions 0.3.10, 0.4.24, 0.5.14, and 0.6.4, a man-in-the-middle attacker can cause Net::IMAP#starttls to     return 'successfully', without starting TLS. This issue has been patched in versions 0.3.10, 0.4.24,     0.5.14, and 0.6.4.(CVE-2026-42246)

    Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to     versions 0.4.24, 0.5.14, and 0.6.4, Net::IMAP::ResponseReader has quadratic time complexity when reading     large responses containing many string literals. A hostile server can send responses which are crafted to     exhaust the client's CPU for a denial of service attack. This issue has been patched in versions 0.4.24,     0.5.14, and 0.6.4.(CVE-2026-42245)

Tenable has extracted the preceding description block directly from the EulerOS ruby 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 Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:37238 advisory.

    Ruby is an extensible, interpreted, object-oriented, scripting language. It has features to process text     files and to perform system management tasks.

    Security Fix(es):

    * erb: ERB: Arbitrary code execution via deserialization bypass (CVE-2026-41316)

    * ruby: net-imap: Net::IMAP: Denial of Service via crafted IMAP responses (CVE-2026-42245)

    * ruby/net-imap: ruby: Net::IMAP: IMAP Command Injection via Symbol Arguments (CVE-2026-42258)

    * net-imap: ruby: Net::IMAP: Information disclosure via man-in-the-middle attack bypassing TLS     (CVE-2026-42246)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux 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	名称	产品	系列	发布时间	最近更新时间	严重程度
323935	RockyLinux 8 : ruby:3.3 (RLSA-2026:33515)	Nessus	Rocky Linux Local Security Checks	2026/6/30	2026/7/7	high
325198	RockyLinux 10 : ruby4.0 (RLSA-2026:33540)	Nessus	Rocky Linux Local Security Checks	2026/7/6	2026/7/6	high
327648	Oracle Linux 10 : ruby4.0 (ELSA-2026-33540)	Nessus	Oracle Linux Local Security Checks	2026/7/17	2026/7/17	high
325467	RHEL 9 : ruby:3.3 (RHSA-2026:36099)	Nessus	Red Hat Local Security Checks	2026/7/7	2026/7/7	high
327720	Fedora 43 : ruby (2026-7b7c2b373e)	Nessus	Fedora Local Security Checks	2026/7/18	2026/7/18	high
332800	EulerOS 2.0 SP13 : ruby (EulerOS-SA-2026-3047)	Nessus	Huawei Local Security Checks	2026/8/6	2026/8/6	high
333473	EulerOS 2.0 SP11 : ruby (EulerOS-SA-2026-3155)	Nessus	Huawei Local Security Checks	2026/8/8	2026/8/8	high
325976	RHEL 9 : ruby:3.3 (RHSA-2026:37238)	Nessus	Red Hat Local Security Checks	2026/7/9	2026/7/9	high

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