The version of Tencent Linux installed on the remote TencentOS Server 3 host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the TSSA-2026:0933 advisory.

    Package updates are available for TencentOS Server 3 that fix the following vulnerabilities:

    CVE-2026-27820:
    zlib is a Ruby interface for the zlib compression/decompression library. Versions 3.0.0 and below, 3.1.0,     3.1.1, 3.2.0 and 3.2.1 contain a buffer overflow vulnerability in the Zlib::GzipReader. The     zstream_buffer_ungets function prepends caller-provided bytes ahead of previously produced output but     fails to guarantee the backing Ruby string has enough capacity before the memmove shifts the existing     data. This can lead to memory corruption when the buffer length exceeds capacity. This issue has been     fixed in versions 3.0.1, 3.1.2 and 3.2.3.

    CVE-2026-42256:
    Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. From versions     0.4.0 to before 0.4.24, 0.5.0 to before 0.5.14, and 0.6.0 to before 0.6.4, when authenticating a     connection with SCRAM-SHA1 or SCRAM-SHA256, a hostile server can perform a computational denial-of-service     attack on the client process by sending a big iteration count value. 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 0.4.24, 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-2026-47240:
    Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to 0.6.5     and 0.5.15, several Net::IMAP commands accept a raw data argument that is sent verbatim after validation     to prevent command injection. However, if a server does not support non-synchronizing literals, it may     still be possible to inject arbitrary IMAP commands inside non-synchronizing literals.  A server without     support for non-synchronizing literals may interpret the +}\r\n as the end of a malformed command line     and respond with a tagged BAD. In that case, the contents of the literal will be interpreted as one or     more new pipelined commands, allowing a CRLF command injection attack to succeed. This affects criteria     for #search and #uid_search; search_keys for #sort, #thread, #uid_sort, and #uid_thread; and attr for     #fetch and #uid_fetch. This vulnerability is fixed in 0.6.5 and 0.5.15.

    CVE-2026-47241:
    Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to 0.6.5     and 0.5.15, several Net::IMAP commands accept a raw string argument which is only validated to prevent     CRLF injection and then sent verbatim. If this string is derived from user-controlled input, an attacker     can force the next command to be absorbed as a continuation of the first command. This will cause the     first command to eventually fail, but also prevents it from returning until another command is sent (from     another thread). That other command will not return until the connection is closed. This vulnerability is     fixed in 0.6.5 and 0.5.15.

    CVE-2026-47242:
    Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to 0.6.5     and 0.5.15, when Net::IMAP#id is called with a hash argument, although the ID field value strings are     correctly quoted (escaping quoted specials), they were not validated to prohibit CRLF sequences. While     Net::IMAP#enable does process its arguments for aliases, it does not validate them as valid atoms (or as a     list of valid atoms). The #to_s value is sent verbatim. Arguments to either command could be used by an     attacker to inject arbitrary IMAP commands. This vulnerability is fixed in 0.6.5 and 0.5.15.

Tenable has extracted the preceding description block directly from the Tencent 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 AlmaLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:50728 advisory.

    * zlib: zlib: Memory corruption via buffer overflow in Zlib::GzipReader (CVE-2026-27820)
      * net-imap: Net::IMAP: Arbitrary IMAP command injection via CRLF sequences in unvalidated input     (CVE-2026-42257)
      * ruby/net-imap: ruby: Net::IMAP: Denial of Service via large iteration count in SCRAM authentication     (CVE-2026-42256)
      * net-imap: Net::IMAP: Command injection via non-synchronizing literals (CVE-2026-47240)
      * net-imap: Net::IMAP: Arbitrary IMAP command injection due to improper input validation     (CVE-2026-47242)
      * net-imap: rubygem-net-imap: Net::IMAP: Denial of Service via malformed command input (CVE-2026-47241)


    Bug Fix(es) and Enhancement(s):

      * ruby:3.3/ruby: Rebase to the latest Ruby 3.3 release [almalinux-8] (JIRA:AlmaLinux-170929)

Tenable has extracted the preceding description block directly from the AlmaLinux 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 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-50828 advisory.

    ruby     [3.3.12-8]
    - Upgrade to Ruby 3.3.12.
      Resolves: RHEL-171335       Resolves: RHEL-193665

    rubygem-mysql2     [0.5.5-3]
    - Disable tests on the 32bit platforms ix86.
      Related: RHEL-80222

    [0.5.5-2]
    - Adapt tests to openssl 3.2       Resolves: RHEL-80222

    [0.5.5-1]
    - Upgrade to mysql2 0.5.5.
      Related: RHEL-17089

    rubygem-pg     [-1.5.4-2]
    - Fix encoding issue in spec suite.
      Resolves: RHEL-159199

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 Rocky Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ crlsa-2026_50827 advisory.

    * zlib: zlib: Memory corruption via buffer overflow in Zlib::GzipReader (CVE-2026-27820)

    * net-imap: Net::IMAP: Arbitrary IMAP command injection via CRLF sequences in unvalidated input     (CVE-2026-42257)

    * ruby/net-imap: ruby: Net::IMAP: Denial of Service via large iteration count in SCRAM authentication     (CVE-2026-42256)

    * net-imap: Net::IMAP: Command injection via non-synchronizing literals (CVE-2026-47240)

    * net-imap: Net::IMAP: Arbitrary IMAP command injection due to improper input validation (CVE-2026-47242)

    * net-imap: rubygem-net-imap: Net::IMAP: Denial of Service via malformed command input (CVE-2026-47241)

    Bug Fix(es) and Enhancement(s):

    * ruby:4.0/ruby: Rebase to the latest Ruby 4.0 release [rhel-9.8.z] (JIRA:Rocky Linux-211301)

Tenable has extracted the preceding description block directly from the CIQ 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 the net-imap Ruby library installed on the remote host is prior to 0.5.15, or 0.6.x prior to 0.6.4.1.
It is, therefore, affected by multiple vulnerabilities.

  - Several Net::IMAP commands accept a raw data argument that is sent verbatim after validation to prevent command     injection. However, if a server does not support non-synchronizing literals, it may still be possible to inject     arbitrary IMAP commands inside non-synchronizing literals. (CVE-2026-47240)

  - Several Net::IMAP commands accept a raw string argument which is only validated to prevent CRLF injection and     then sent verbatim. If this string is derived from user-controlled input, an attacker can force the next command     to be absorbed as a continuation of the first command, causing a denial of service. (CVE-2026-47241)

  - Two Net::IMAP commands, id and enable, do not validate their arguments. Arguments to either command could be     used by an attacker to inject arbitrary IMAP commands. (CVE-2026-47242)

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

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-106187 advisory.

    Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to 0.6.5     and 0.5.15, several Net::IMAP commands accept a raw string argument which is only validated to prevent     CRLF injection and then sent verbatim. If this string is derived from user-controlled input, an attacker     can force the next command to be absorbed as a continuation of the first command. This will cause the     first command to eventually fail, but also prevents it from returning until another command is sent (from     another thread). That other command will not return until the connection is closed. This vulnerability is     fixed in 0.6.5 and 0.5.15.

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

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

The remote MiracleLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2026-1667:01 advisory.

    * zlib: zlib: Memory corruption via buffer overflow in Zlib::GzipReader (CVE-2026-27820)
      * net-imap: Net::IMAP: Arbitrary IMAP command injection via CRLF sequences in unvalidated input     (CVE-2026-42257)
      * ruby/net-imap: ruby: Net::IMAP: Denial of Service via large iteration count in SCRAM authentication     (CVE-2026-42256)
      * net-imap: Net::IMAP: Command injection via non-synchronizing literals (CVE-2026-47240)
      * net-imap: Net::IMAP: Arbitrary IMAP command injection due to improper input validation     (CVE-2026-47242)
      * net-imap: rubygem-net-imap: Net::IMAP: Denial of Service via malformed command input (CVE-2026-47241)

Tenable has extracted the preceding description block directly from the MiracleLinux 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 Rocky Linux 10.2 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ crlsa-2026_50778 advisory.

    * zlib: zlib: Memory corruption via buffer overflow in Zlib::GzipReader (CVE-2026-27820)

    * net-imap: Net::IMAP: Arbitrary IMAP command injection via CRLF sequences in unvalidated input     (CVE-2026-42257)

    * ruby/net-imap: ruby: Net::IMAP: Denial of Service via large iteration count in SCRAM authentication     (CVE-2026-42256)

    * net-imap: Net::IMAP: Command injection via non-synchronizing literals (CVE-2026-47240)

    * net-imap: Net::IMAP: Arbitrary IMAP command injection due to improper input validation (CVE-2026-47242)

    * net-imap: rubygem-net-imap: Net::IMAP: Denial of Service via malformed command input (CVE-2026-47241)

    Bug Fix(es) and Enhancement(s):

    * ruby: Rebase to the latest Ruby 3.3 release [rhel-10.2.z] (JIRA:Rocky Linux-211300)

Tenable has extracted the preceding description block directly from the CIQ 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 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2026-50827 advisory.

    ruby     [4.0.6-34]
    - Upgrade to Ruby 4.0.6.
      Resolves: RHEL-211301       Resolves: RHEL-193663

    rubygem-mysql2     [0.5.7-1]
    - Upgrade to mysql2 0.5.7.
      Related: RHEL-142278

    [0.5.5-3]
    - Disable tests on the 32bit platforms ix86.
      Related: RHEL-80222

    [0.5.5-2]
    - Adapt tests to openssl 3.2       Resolves: RHEL-80222

    rubygem-pg     [1.6.3-1]
    - Upgrade to pg 1.6.3       Related: RHEL-142278

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 AlmaLinux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:50778 advisory.

    * zlib: zlib: Memory corruption via buffer overflow in Zlib::GzipReader (CVE-2026-27820)
      * net-imap: Net::IMAP: Arbitrary IMAP command injection via CRLF sequences in unvalidated input     (CVE-2026-42257)
      * ruby/net-imap: ruby: Net::IMAP: Denial of Service via large iteration count in SCRAM authentication     (CVE-2026-42256)
      * net-imap: Net::IMAP: Command injection via non-synchronizing literals (CVE-2026-47240)
      * net-imap: Net::IMAP: Arbitrary IMAP command injection due to improper input validation     (CVE-2026-47242)
      * net-imap: rubygem-net-imap: Net::IMAP: Denial of Service via malformed command input (CVE-2026-47241)


    Bug Fix(es) and Enhancement(s):

      * ruby: Rebase to the latest Ruby 3.3 release [almalinux-10.2.z] (JIRA:AlmaLinux-211300)

Tenable has extracted the preceding description block directly from the AlmaLinux 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 Rocky Linux 10.2 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ crlsa-2026_50773 advisory.

    * zlib: zlib: Memory corruption via buffer overflow in Zlib::GzipReader (CVE-2026-27820)

    * net-imap: Net::IMAP: Arbitrary IMAP command injection via CRLF sequences in unvalidated input     (CVE-2026-42257)

    * ruby/net-imap: ruby: Net::IMAP: Denial of Service via large iteration count in SCRAM authentication     (CVE-2026-42256)

    * net-imap: Net::IMAP: Command injection via non-synchronizing literals (CVE-2026-47240)

    * net-imap: Net::IMAP: Arbitrary IMAP command injection due to improper input validation (CVE-2026-47242)

    * net-imap: rubygem-net-imap: Net::IMAP: Denial of Service via malformed command input (CVE-2026-47241)

    Bug Fix(es) and Enhancement(s):

    * ruby4.0: Rebase to the latest Ruby 4.0 release [rhel-10.2.z] (JIRA:Rocky Linux-211310)

Tenable has extracted the preceding description block directly from the CIQ 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 Rocky Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ crlsa-2026_50828 advisory.

    * zlib: zlib: Memory corruption via buffer overflow in Zlib::GzipReader (CVE-2026-27820)

    * net-imap: Net::IMAP: Arbitrary IMAP command injection via CRLF sequences in unvalidated input     (CVE-2026-42257)

    * ruby/net-imap: ruby: Net::IMAP: Denial of Service via large iteration count in SCRAM authentication     (CVE-2026-42256)

    * net-imap: Net::IMAP: Command injection via non-synchronizing literals (CVE-2026-47240)

    * net-imap: Net::IMAP: Arbitrary IMAP command injection due to improper input validation (CVE-2026-47242)

    * net-imap: rubygem-net-imap: Net::IMAP: Denial of Service via malformed command input (CVE-2026-47241)

    Bug Fix(es) and Enhancement(s):

    * ruby:3.3/ruby: Rebase to the latest Ruby 3.3 release [rhel-9.8.z] (JIRA:Rocky Linux-171335)

Tenable has extracted the preceding description block directly from the CIQ 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
342068	TencentOS Server 3: ruby:3.3 (TSSA-2026:0933)	Nessus	Tencent Local Security Checks	2026/9/1	2026/9/1	medium
345618	AlmaLinux 8 : ruby:3.3 (ALSA-2026:50728)	Nessus	Alma Linux Local Security Checks	2026/9/14	2026/9/14	medium
334141	Oracle Linux 9 : ruby:3.3 (ELSA-2026-50828)	Nessus	Oracle Linux Local Security Checks	2026/8/10	2026/8/10	medium
358560	Rocky Linux 9 [CIQ] Security Update: ruby / ruby-bundled-gems / ruby-bundled-gems-debuginfo / etc Multiple Vulnerabilities (crlsa-2026_50827)	Nessus	Rocky Linux Local Security Checks	2026/10/1	2026/10/1	medium
321503	Ruby net-imap < 0.5.15 / 0.6.x < 0.6.4.1 Multiple Vulnerabilities	Nessus	Misc.	2026/6/18	2026/6/26	medium
342884	Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: ruby (UTSA-2026-106187)	Nessus	Unity Linux Local Security Checks	2026/9/4	2026/9/4	low
341076	MiracleLinux 9 : ruby:4.0 (AXSA:2026-1667:01)	Nessus	Miracle Linux Local Security Checks	2026/8/27	2026/8/27	medium
358615	Rocky Linux 10.2 [CIQ] Security Update: ruby / ruby-bundled-gems / ruby-bundled-gems-debuginfo / etc Multiple Vulnerabilities (crlsa-2026_50778)	Nessus	Rocky Linux Local Security Checks	2026/10/1	2026/10/1	medium
334161	Oracle Linux 9 : ruby:4.0 (ELSA-2026-50827)	Nessus	Oracle Linux Local Security Checks	2026/8/10	2026/8/10	medium
345620	AlmaLinux 10 : ruby (ALSA-2026:50778)	Nessus	Alma Linux Local Security Checks	2026/9/14	2026/9/14	medium
358083	Rocky Linux 10.2 [CIQ] Security Update: ruby4.0 / ruby4.0-debuginfo / ruby4.0-debugsource / ruby4.0-devel / etc Multiple Vulnerabilities (crlsa-2026_50773)	Nessus	Rocky Linux Local Security Checks	2026/10/1	2026/10/1	medium
359098	Rocky Linux 9 [CIQ] Security Update: ruby / ruby-bundled-gems / ruby-bundled-gems-debuginfo / etc Multiple Vulnerabilities (crlsa-2026_50828)	Nessus	Rocky Linux Local Security Checks	2026/10/1	2026/10/1	medium

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