Bug 2461369 (CVE-2026-41316) - CVE-2026-41316 erb: ERB: Arbitrary code execution via deserialization bypass
Summary: CVE-2026-41316 erb: ERB: Arbitrary code execution via deserialization bypass
Keywords:
Status: NEW
Alias: CVE-2026-41316
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2463216
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-04-24 03:01 UTC by OSIDB Bzimport
Modified: 2026-06-30 11:24 UTC (History)
6 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:18030 0 None None None 2026-05-18 13:02:40 UTC
Red Hat Product Errata RHSA-2026:18039 0 None None None 2026-05-18 12:16:49 UTC
Red Hat Product Errata RHSA-2026:18065 0 None None None 2026-05-18 12:43:06 UTC
Red Hat Product Errata RHSA-2026:20596 0 None None None 2026-05-26 07:14:21 UTC
Red Hat Product Errata RHSA-2026:20606 0 None None None 2026-05-26 05:16:03 UTC
Red Hat Product Errata RHSA-2026:20614 0 None None None 2026-05-26 07:16:56 UTC
Red Hat Product Errata RHSA-2026:20670 0 None None None 2026-05-26 07:17:48 UTC
Red Hat Product Errata RHSA-2026:26312 0 None None None 2026-06-16 13:27:04 UTC
Red Hat Product Errata RHSA-2026:26655 0 None None None 2026-06-17 16:44:46 UTC
Red Hat Product Errata RHSA-2026:33462 0 None None None 2026-06-30 10:49:29 UTC
Red Hat Product Errata RHSA-2026:33478 0 None None None 2026-06-30 11:24:05 UTC

Description OSIDB Bzimport 2026-04-24 03:01:40 UTC 
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.
Comment 4 errata-xmlrpc 2026-05-18 12:16:48 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:18039 https://access.redhat.com/errata/RHSA-2026:18039
Comment 5 errata-xmlrpc 2026-05-18 12:43:05 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:18065 https://access.redhat.com/errata/RHSA-2026:18065
Comment 6 errata-xmlrpc 2026-05-18 13:02:39 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:18030 https://access.redhat.com/errata/RHSA-2026:18030
Comment 7 errata-xmlrpc 2026-05-26 05:16:02 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:20606 https://access.redhat.com/errata/RHSA-2026:20606
Comment 8 errata-xmlrpc 2026-05-26 07:14:20 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:20596 https://access.redhat.com/errata/RHSA-2026:20596
Comment 9 errata-xmlrpc 2026-05-26 07:16:55 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:20614 https://access.redhat.com/errata/RHSA-2026:20614
Comment 10 errata-xmlrpc 2026-05-26 07:17:47 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions

Via RHSA-2026:20670 https://access.redhat.com/errata/RHSA-2026:20670
Comment 11 errata-xmlrpc 2026-06-16 13:27:02 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:26312 https://access.redhat.com/errata/RHSA-2026:26312
Comment 12 errata-xmlrpc 2026-06-17 16:44:45 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:26655 https://access.redhat.com/errata/RHSA-2026:26655
Comment 14 errata-xmlrpc 2026-06-30 10:49:28 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:33462 https://access.redhat.com/errata/RHSA-2026:33462
Comment 15 errata-xmlrpc 2026-06-30 11:24:04 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:33478 https://access.redhat.com/errata/RHSA-2026:33478
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