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Vulnerability record · CVE-2018-16396 · published 16 November 2018

CVE-2018-16396: Ruby-lang ruby vulnerability

Ruby Lang · Ruby

An issue was discovered in Ruby before 2.3.8, 2.4.x before 2.4.5, 2.5.x before 2.5.2, and 2.6.x before 2.6.0-preview3. It does not taint strings that result from unpacking tainted strings with some formats.

8.1 CVSS 3.0 High EPSS 8.0% · top 5.4%
8.1CVSS 3.0 base score, v2 6.8
8.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
32References
17 Jun 2026Last modified by NVD

Description

An issue was discovered in Ruby before 2.3.8, 2.4.x before 2.4.5, 2.5.x before 2.5.2, and 2.6.x before 2.6.0-preview3. It does not taint strings that result from unpacking tainted strings with some formats.

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

4 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00036.html
http://www.securitytracker.com/id/1042106 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2018:3729 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3730 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3731 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2028
https://hackerone.com/reports/385070 Permissions RequiredThird Party Advisory
https://lists.debian.org/debian-lts-announce/2018/10/msg00020.html Third Party Advisory
https://security.netapp.com/advisory/ntap-20190221-0002/ Third Party Advisory
https://usn.ubuntu.com/3808-1/ Third Party Advisory
https://www.debian.org/security/2018/dsa-4332 Third Party Advisory
https://www.ruby-lang.org/en/news/2018/10/17/not-propagated-taint-flag-in-some-formats-of-pack-cve-2018-16396/ Vendor Advisory
https://www.ruby-lang.org/en/news/2018/10/17/ruby-2-3-8-released/ Release Notes
https://www.ruby-lang.org/en/news/2018/10/17/ruby-2-4-5-released/ Release Notes
https://www.ruby-lang.org/en/news/2018/10/17/ruby-2-5-2-released/ Release Notes
https://www.ruby-lang.org/en/news/2018/11/06/ruby-2-6-0-preview3-released/ Release Notes
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00036.html
http://www.securitytracker.com/id/1042106 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2018:3729 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3730 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3731 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2028
https://hackerone.com/reports/385070 Permissions RequiredThird Party Advisory
https://lists.debian.org/debian-lts-announce/2018/10/msg00020.html Third Party Advisory
https://security.netapp.com/advisory/ntap-20190221-0002/ Third Party Advisory
https://usn.ubuntu.com/3808-1/ Third Party Advisory
https://www.debian.org/security/2018/dsa-4332 Third Party Advisory
https://www.ruby-lang.org/en/news/2018/10/17/not-propagated-taint-flag-in-some-formats-of-pack-cve-2018-16396/ Vendor Advisory
https://www.ruby-lang.org/en/news/2018/10/17/ruby-2-3-8-released/ Release Notes
https://www.ruby-lang.org/en/news/2018/10/17/ruby-2-4-5-released/ Release Notes
https://www.ruby-lang.org/en/news/2018/10/17/ruby-2-5-2-released/ Release Notes
https://www.ruby-lang.org/en/news/2018/11/06/ruby-2-6-0-preview3-released/ Release Notes

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Source: NIST National Vulnerability Database (record CVE-2018-16396), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.