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Vulnerability record · CVE-2016-0751 · published 16 February 2016

CVE-2016-0751: Rubyonrails rails vulnerability

Rubyonrails · Rails

actionpack/lib/action_dispatch/http/mime_type.rb in Action Pack in Ruby on Rails before 3.2.22.1, 4.0.x and 4.1.x before 4.1.14.1, 4.2.x before 4.2.5.1, and 5.x before 5.0.0.beta1.1 does not properly restrict use of the MIME type cache, which allows remote attackers to cause a denial of service (memory consumption) via a crafted HTTP Accept header.

7.5 CVSS 3.0 High EPSS 9.7% · top 4.6% CWE-399 · CWE-399
7.5CVSS 3.0 base score, v2 5.0
9.7%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
22References
17 Jun 2026Last modified by NVD

Description

actionpack/lib/action_dispatch/http/mime_type.rb in Action Pack in Ruby on Rails before 3.2.22.1, 4.0.x and 4.1.x before 4.1.14.1, 4.2.x before 4.2.5.1, and 5.x before 5.0.0.beta1.1 does not properly restrict use of the MIME type cache, which allows remote attackers to cause a denial of service (memory consumption) via a crafted HTTP Accept header.

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

Affected products

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

References

LinkTags
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/178043.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/178067.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00053.html
http://lists.opensuse.org/opensuse-updates/2016-02/msg00034.html
http://lists.opensuse.org/opensuse-updates/2016-02/msg00043.html
http://rhn.redhat.com/errata/RHSA-2016-0296.html
http://www.debian.org/security/2016/dsa-3464
http://www.openwall.com/lists/oss-security/2016/01/25/9
http://www.securityfocus.com/bid/81800
http://www.securitytracker.com/id/1034816
https://groups.google.com/forum/message/raw?msg=ruby-security-ann/9oLY_FCzvoc/5CDXbvpYEgAJ
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/178043.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/178067.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00053.html
http://lists.opensuse.org/opensuse-updates/2016-02/msg00034.html
http://lists.opensuse.org/opensuse-updates/2016-02/msg00043.html
http://rhn.redhat.com/errata/RHSA-2016-0296.html
http://www.debian.org/security/2016/dsa-3464
http://www.openwall.com/lists/oss-security/2016/01/25/9
http://www.securityfocus.com/bid/81800
http://www.securitytracker.com/id/1034816
https://groups.google.com/forum/message/raw?msg=ruby-security-ann/9oLY_FCzvoc/5CDXbvpYEgAJ

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Source: NIST National Vulnerability Database (record CVE-2016-0751), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.