Vulnerability-Lookup

alsa-2026:20606

Vulnerability from osv_almalinux

Published

2026-05-26 00:00

Modified

2026-06-04 10:20

Summary

Important: ruby4.0 security update

Details

Ruby is the interpreted scripting language for quick and easy object-oriented programming. It has many features to process text files and to do system management tasks (as in Perl). It is simple, straight-forward, and extensible.

Security Fix(es):

ruby/json: Ruby JSON: Denial of Service or Information Disclosure via format string injection (CVE-2026-33210)
erb: ERB: Arbitrary code execution via deserialization bypass (CVE-2026-41316)

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.

References

URL

Type

	https://access.redhat.com/errata/RHSA-2026:20606	ADVISORY
	https://access.redhat.com/security/cve/CVE-2026-33210	REPORT
	https://access.redhat.com/security/cve/CVE-2026-41316	REPORT
	https://bugzilla.redhat.com/2449871	REPORT
	https://bugzilla.redhat.com/2461369	REPORT
	https://errata.almalinux.org/10/ALSA-2026-20606.html	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "ruby4.0"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.0.3-34.el10_2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "ruby4.0-devel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.0.3-34.el10_2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "ruby4.0-doc"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.0.3-34.el10_2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "ruby4.0-rubygem-mysql2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.5.7-34.el10_2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "ruby4.0-rubygem-pg"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.6.3-34.el10_2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "Ruby is the interpreted scripting language for quick and easy object-oriented programming. It has many features to process text files and to do system management tasks (as in Perl). It is simple, straight-forward, and extensible.  \n\nSecurity Fix(es):  \n\n  * ruby/json: Ruby JSON: Denial of Service or Information Disclosure via format string injection (CVE-2026-33210)\n  * erb: ERB: Arbitrary code execution via deserialization bypass (CVE-2026-41316)\n\n\nFor 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.\n",
  "id": "ALSA-2026:20606",
  "modified": "2026-06-04T10:20:08Z",
  "published": "2026-05-26T00:00:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:20606"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-33210"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-41316"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2449871"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2461369"
    },
    {
      "type": "ADVISORY",
      "url": "https://errata.almalinux.org/10/ALSA-2026-20606.html"
    }
  ],
  "related": [
    "CVE-2026-33210",
    "CVE-2026-41316"
  ],
  "summary": "Important: ruby4.0 security update"
}

CVE-2026-33210 (GCVE-0-2026-33210)

Vulnerability from cvelistv5 – Published: 2026-03-20 22:57 – Updated: 2026-03-23 21:41

Title

Ruby JSON has a format string injection vulnerability

Summary

Ruby JSON is a JSON implementation for Ruby. From version 2.14.0 to before versions 2.15.2.1, 2.17.1.2, and 2.19.2, a format string injection vulnerability can lead to denial of service attacks or information disclosure, when the allow_duplicate_key: false parsing option is used to parse user supplied documents. This issue has been patched in versions 2.15.2.1, 2.17.1.2, and 2.19.2.

Severity

8.3 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-134 - Use of Externally-Controlled Format String

Assigner

GitHub_M

References

1 reference

URL	Tags
https://github.com/ruby/json/security/advisories/…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
ruby	json	Affected: >= 2.14.0, < 2.15.2.1 Affected: >= 2.16.0, < 2.17.1.2 Affected: >= 2.18.0, < 2.19.2

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-33210",
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                  },
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                  }
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                "role": "CISA Coordinator",
                "timestamp": "2026-03-23T21:01:54.342811Z",
                "version": "2.0.3"
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      }
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          "vendor": "ruby",
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              "status": "affected",
              "version": "\u003e= 2.14.0, \u003c 2.15.2.1"
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              "version": "\u003e= 2.16.0, \u003c 2.17.1.2"
            },
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              "version": "\u003e= 2.18.0, \u003c 2.19.2"
            }
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      ],
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          "lang": "en",
          "value": "Ruby JSON is a JSON implementation for Ruby. From version 2.14.0 to before versions 2.15.2.1, 2.17.1.2, and 2.19.2, a format string injection vulnerability can lead to denial of service attacks or information disclosure, when the allow_duplicate_key: false parsing option is used to parse user supplied documents. This issue has been patched in versions 2.15.2.1, 2.17.1.2, and 2.19.2."
        }
      ],
      "metrics": [
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            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
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            "baseScore": 8.3,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
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            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N",
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      "title": "Ruby JSON has a format string injection vulnerability"
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  "dataType": "CVE_RECORD",
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}

CVE-2026-41316 (GCVE-0-2026-41316)

Vulnerability from cvelistv5 – Published: 2026-04-24 02:35 – Updated: 2026-04-25 01:45

Title

ERB has an @_init deserialization guard bypass via def_module / def_method / def_class

Summary

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.

Severity

8.1 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-693 - Protection Mechanism Failure

Assigner

GitHub_M

References

1 reference

URL	Tags
https://github.com/ruby/erb/security/advisories/G…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
ruby	erb	Affected: < 4.0.3.1 Affected: = 4.0.4 Affected: >= 5.0.0, < 6.0.1.1 Affected: >= 6.0.2, < 6.0.4

Show details on NVD website

JSON

To clipboard

{
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          {
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                "id": "CVE-2026-41316",
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                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-25T01:45:02.467085Z",
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

alsa-2026:20606

Vulnerability from osv_almalinux

CVE-2026-33210 (GCVE-0-2026-33210)

CVE-2026-41316 (GCVE-0-2026-41316)

Tags

Sightings

Nomenclature