Description
A denial of service vulnerability in the multipart parsing component of Rack fixed in 2.0.9.2, 2.1.4.2, 2.2.4.1 and 3.0.0.1 could allow an attacker tocraft input that can cause RFC2183 multipart boundary parsing in Rack to take an unexpected amount of time, possibly resulting in a denial of service attack vector. Any applications that parse multipart posts using Rack (virtually all Rails applications) are impacted.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | https://github.com/rack/rack | 2.0.9.2, 2.1.4.2, 2.2.4.1, 3.0.0.1 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | ruby-rack | 2.2.4-3 | — |
| Debian 13 | ruby-rack | 2.2.4-3 | — |
| Debian 12 | ruby-rack | 2.2.4-3 | — |
| Debian 11 | ruby-rack | 2.1.4-3+deb11u1 | DSA-5530-1 |
| Debian 10 | ruby-rack | 2.0.6-3+deb10u2 | DLA-3298-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | ruby-rack | 2.1.4-5ubuntu1.1 | USN-7036-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 22.04 LTS | ruby-rack | 2.1.4-5ubuntu1+esm3 | USN-5910-1 |
| Ubuntu Pro 20.04 LTS | ruby-rack | 2.0.7-2ubuntu0.1+esm3 | USN-5910-1 |
| Ubuntu Pro 18.04 LTS | ruby-rack | 1.6.4-4ubuntu0.2+esm4 | USN-5910-1 |
| Ubuntu Pro 16.04 LTS | ruby-rack | 1.6.4-3ubuntu0.2+esm4 | USN-5910-1 |
| Ubuntu Pro 14.04 LTS | ruby-rack | 1.5.2-3+deb8u3ubuntu1~esm6 | USN-5910-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Satellite Utils 6 | foreman +1 | 3.7.0.9-1.el8sat | RHSA-2023:6818 |
| Red Hat Satellite Capsule 6 | foreman +1 | 3.7.0.9-1.el8sat | RHSA-2023:6818 |
| Red Hat Satellite Capsule 6 | puppet-agent | 7.26.0-3.el8sat | RHSA-2023:6818 |
| Red Hat Satellite Capsule 6 | puppetserver | 7.11.0-1.el8sat | RHSA-2023:6818 |
| Red Hat Satellite Capsule 6 | python-django +1 | 3.2.21-1.el8pc | RHSA-2023:6818 |
| Red Hat Satellite Capsule 6 | python-future +1 | 0.18.3-1.el8pc | RHSA-2023:6818 |
| Red Hat Satellite Capsule 6 | python-gitpython +1 | 3.1.32-1.el8pc | RHSA-2023:6818 |
| Red Hat Satellite Capsule 6 | python-pulp-ansible +1 | 1:0.16.0-1.el8pc | RHSA-2023:6818 |
| Red Hat Satellite Capsule 6 | python-requests +1 | 2.31.0-1.el8pc | RHSA-2023:6818 |
| Red Hat Satellite Capsule 6 | python-sqlparse +1 | 0.4.4-1.el8pc | RHSA-2023:6818 |
| Red Hat Satellite Capsule 6 | rubygem-rack | 2.2.7-1.el8sat | RHSA-2023:6818 |
| Red Hat Satellite 6 | foreman +13 | 3.7.0.9-1.el8sat | RHSA-2023:6818 |
| Red Hat Satellite 6 | puppet-agent | 7.26.0-3.el8sat | RHSA-2023:6818 |
| Red Hat Satellite 6 | puppetserver | 7.11.0-1.el8sat | RHSA-2023:6818 |
| Red Hat Satellite 6 | python-django +1 | 3.2.21-1.el8pc | RHSA-2023:6818 |
| Red Hat Satellite 6 | python-future +1 | 0.18.3-1.el8pc | RHSA-2023:6818 |
| Red Hat Satellite 6 | python-gitpython +1 | 3.1.32-1.el8pc | RHSA-2023:6818 |
| Red Hat Satellite 6 | python-pulp-ansible +1 | 1:0.16.0-1.el8pc | RHSA-2023:6818 |
| Red Hat Satellite 6 | python-requests +1 | 2.31.0-1.el8pc | RHSA-2023:6818 |
| Red Hat Satellite 6 | python-sqlparse +1 | 0.4.4-1.el8pc | RHSA-2023:6818 |
| Red Hat Satellite 6 | rubygem-actionpack +2 | 6.1.7.3-1.el8sat | RHSA-2023:6818 |
| Red Hat Satellite 6 | rubygem-git | 1.18.0-1.el8sat | RHSA-2023:6818 |
| Red Hat Satellite 6 | rubygem-globalid | 1.1.0-1.el8sat | RHSA-2023:6818 |
| Red Hat Satellite 6 | rubygem-kubeclient | 4.10.1-1.el8sat | RHSA-2023:6818 |
| Red Hat Satellite 6 | rubygem-rack | 2.2.7-1.el8sat | RHSA-2023:6818 |
| Red Hat Satellite 6 | yggdrasil-worker-forwarder | 0.0.3-1.el8sat | RHSA-2023:6818 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP4 | rubygem-rack | 2.0.8-150000.3.12.1 | SUSE-SU-2023:0276-1 |
| SLES 15 SP3 | rubygem-rack | 2.0.8-150000.3.12.1 | SUSE-SU-2023:0276-1 |
| SLES 15 SP2 | rubygem-rack | 2.0.8-150000.3.12.1 | SUSE-SU-2023:0276-1 |
| SLES 15 SP1 | rubygem-rack | 2.0.8-150000.3.12.1 | SUSE-SU-2023:0276-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | ruby3.2-rubygem-rack | 3.0.7-1.2 | openSUSE-SU-2024:13167-1 |
| openSUSE Tumbleweed | ruby3.2-rubygem-rack-2.2 | 2.2.7-1.1 | openSUSE-SU-2024:12974-1 |
| openSUSE Tumbleweed | rubygem-rack | 3.0.4.1-1.1 | openSUSE-SU-2026:10358-1, openSUSE-SU-2025:14875-1, openSUSE-SU-2024:13726-1 |
| openSUSE Tumbleweed | rubygem-rack-2.2 | 2.2.6.2-1.1 | openSUSE-SU-2026:10286-1, openSUSE-SU-2025:14811-1, openSUSE-SU-2024:13727-1 |
| openSUSE Leap 15.4 | rubygem-rack | 2.0.8-150000.3.12.1 | SUSE-SU-2023:0276-1 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| RubyGems | rack | >= 2.0.0, < 2.0.9.2 | 2.0.9.2 | GHSA-rqv2-275x-2jq5 |
| RubyGems | rack | >= 2.1.0.0, < 2.1.4.2 | 2.1.4.2 | GHSA-rqv2-275x-2jq5 |
| RubyGems | rack | >= 2.2.0.0, < 2.2.6.1 | 2.2.6.1 | GHSA-rqv2-275x-2jq5 |
| RubyGems | rack | >= 3.0.0.0, < 3.0.4.1 | 3.0.4.1 | GHSA-rqv2-275x-2jq5 |
Advisories 16
- RHSA-2023:6818 Red Hat Security Advisory: Satellite 6.14 security and bug fix update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- USN-5910-1 ruby-rack vulnerabilities Ubuntu Security Notices (USN) · Jun 29, 2026
- openSUSE-SU-2026:10286-1 ruby4.0-rubygem-rack-2.2-2.2.22-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2026:10358-1 ruby4.0-rubygem-rack-3.1.18-1.3 on GA media SUSE / openSUSE Security Updates · Mar 14, 2026
- DSA-5530-1 ruby-rack - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3298-1 ruby-rack - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-7036-1 ruby-rack vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- openSUSE-SU-2025:14811-1 ruby3.4-rubygem-rack-2.2-2.2.11-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13727-1 ruby3.3-rubygem-rack-2.2-2.2.8.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13167-1 ruby3.2-rubygem-rack-3.0.7-1.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:0276-1 Security update for rubygem-rack SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:12633-1 ruby3.1-rubygem-rack-3.0.4.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:12634-1 ruby3.1-rubygem-rack-2.2-2.2.6.2-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:13726-1 ruby3.3-rubygem-rack-3.0.9.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:12974-1 ruby3.2-rubygem-rack-2.2-2.2.7-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2025:14875-1 ruby3.4-rubygem-rack-3.1.12-1.1 on GA media SUSE / openSUSE Security Updates · May 7, 2025