# CVE-2025-59830: ruby-rack: Rack is a modular Ruby web server interface CVE-2025-59830 is fixed in 4 products on 1 platform, first by DEBIAN-CVE-2025-59830, released September 25, 2025. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2025-59830 - Priority: High - CVSS: 7.5 (Medium) - EPSS: 0.0060 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Sep 25, 2025 ## Description Rack is a modular Ruby web server interface. Prior to version 2.2.18,Rack::QueryParser enforces its params_limit only for parameters separatedby &, while still splitting on both & and ;. As a result, attackers coulduse ; separators to bypass the parameter count limit and submit moreparameters than intended. Applications or middleware that directly invokeRack::QueryParser with its default configuration (no explicit delimiter)could be exposed to increased CPU and memory consumption. This can beabused as a limited denial-of-service vector. This issue has been patchedin version 2.2.18. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | cockpit-ha-cluster almalinux 10 | 0.12.1-1.el10_1.1 | [ALSA-2025:21036](https://patchblox.com/security/data/fix/linux/alsa-2025-21036.md) | Nov 11, 2025 | | Linux | cockpit-ha-cluster ol 10 | 0:0.12.0-3.0.1.el10_0.3 | [ELSA-2025-19513](https://patchblox.com/security/data/fix/linux/elsa-2025-19513.md) | Nov 7, 2025 | | Linux | pcs RHEL 10 | 0.12.1-1.el10_1.1 | [RHSA-2025:21036](https://patchblox.com/security/data/fix/linux/rhsa-2025-21036.md) | Oct 10, 2025 | | Linux | pcs RHEL 8 | 0:0.10.18-2.el8_10.7 | [RHSA-2025:19719](https://patchblox.com/security/data/fix/linux/rhsa-2025-19719.md) | Nov 4, 2025 | | Linux | pcs RHEL 9 | 0:0.11.10-1.el9_7.1 | [RHSA-2025:20962](https://patchblox.com/security/data/fix/linux/rhsa-2025-20962.md) | Nov 11, 2025 | | Linux | pcs almalinux 8 | 0.10.18-2.el8_10.7.alma.1 | [ALSA-2025:19719](https://patchblox.com/security/data/fix/linux/alsa-2025-19719.md) | Nov 4, 2025 | | Linux | pcs almalinux 9 | 0.11.10-1.el9_7.1 | [ALSA-2025:20962](https://patchblox.com/security/data/fix/linux/alsa-2025-20962.md) | Nov 11, 2025 | | Linux | pcs ol 10 | 0:0.12.0-3.0.1.el10_0.3 | [ELSA-2025-19513](https://patchblox.com/security/data/fix/linux/elsa-2025-19513.md) | Nov 7, 2025 | | Linux | pcs ol 8 | 0:0.10.18-2.0.1.el8_10.7 | [ELSA-2025-19719](https://patchblox.com/security/data/fix/linux/elsa-2025-19719.md) | Nov 6, 2025 | | Linux | pcs ol 9 | 0:0.11.9-2.el9_6.2 | [ELSA-2025-19512](https://patchblox.com/security/data/fix/linux/elsa-2025-19512.md) | Nov 3, 2025 | | Linux | pcs rocky 8 | 0:0.10.18-2.el8_10.7 | [RLSA-2025:19719](https://patchblox.com/security/data/fix/linux/rlsa-2025-19719.md) | Nov 5, 2025 | | Linux | pcs rocky 9 | 0:0.11.10-1.el9_7.1 | [RLSA-2025:20962](https://patchblox.com/security/data/fix/linux/rlsa-2025-20962.md) | Nov 21, 2025 | | Linux | pcs-snmp RHEL 8 | 0:0.10.18-2.el8_10.7 | [RHSA-2025:19719](https://patchblox.com/security/data/fix/linux/rhsa-2025-19719.md) | Nov 4, 2025 | | Linux | pcs-snmp RHEL 9 | 0:0.11.10-1.el9_7.1 | [RHSA-2025:20962](https://patchblox.com/security/data/fix/linux/rhsa-2025-20962.md) | Nov 11, 2025 | | Linux | pcs-snmp almalinux 8 | 0.10.18-2.el8_10.7.alma.1 | [ALSA-2025:19719](https://patchblox.com/security/data/fix/linux/alsa-2025-19719.md) | Nov 4, 2025 | | Linux | pcs-snmp almalinux 9 | 0.11.10-1.el9_7.1 | [ALSA-2025:20962](https://patchblox.com/security/data/fix/linux/alsa-2025-20962.md) | Nov 11, 2025 | | Linux | pcs-snmp ol 10 | 0:0.12.0-3.0.1.el10_0.3 | [ELSA-2025-19513](https://patchblox.com/security/data/fix/linux/elsa-2025-19513.md) | Nov 7, 2025 | | Linux | pcs-snmp ol 8 | 0:0.10.18-2.0.1.el8_10.7 | [ELSA-2025-19719](https://patchblox.com/security/data/fix/linux/elsa-2025-19719.md) | Nov 6, 2025 | | Linux | pcs-snmp ol 9 | 0:0.11.9-2.el9_6.2 | [ELSA-2025-19512](https://patchblox.com/security/data/fix/linux/elsa-2025-19512.md) | Nov 3, 2025 | | Linux | ruby-rack Debian 12.15 (bookworm) | 2.2.20-0+deb12u1 | [DEBIAN-CVE-2025-59830](https://patchblox.com/security/data/fix/linux/debian-cve-2025-59830.md) | Sep 25, 2025 | | Linux | ruby-rack Debian 13.5 (trixie) | 3.0.8-2 | [DEBIAN-CVE-2025-59830](https://patchblox.com/security/data/fix/linux/debian-cve-2025-59830.md) | Sep 25, 2025 | | Linux | ruby-rack Debian 14 | 3.0.8-2 | [DEBIAN-CVE-2025-59830](https://patchblox.com/security/data/fix/linux/debian-cve-2025-59830.md) | Sep 25, 2025 | | Linux | ruby-rack Ubuntu 20.04 LTS (focal) | 2.0.7-2ubuntu0.1+esm8 | [ruby-rack 2.0.7-2ubuntu0.1+esm8](https://patchblox.com/security/data/fix/linux/ubuntu-focal-ruby-rack-2.0.7-2ubuntu0.1-esm8.md) | Oct 10, 2025 | | Linux | ruby-rack Ubuntu 22.04.1 LTS (jammy) | 2.1.4-5ubuntu1.2 | [ruby-rack 2.1.4-5ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-ruby-rack-2.1.4-5ubuntu1.2.md) | Oct 10, 2025 | | Linux | ruby-rack Ubuntu 24.04.5 LTS (noble) | 2.2.7-1ubuntu0.4 | [ruby-rack 2.2.7-1ubuntu0.4](https://patchblox.com/security/data/fix/linux/ubuntu-noble-ruby-rack-2.2.7-1ubuntu0.4.md) | Sep 25, 2025 | | Linux | ruby-rack Ubuntu 25.04 (plucky) | 2.2.7-1.1ubuntu0.25.04.3 | [ruby-rack 2.2.7-1.1ubuntu0.25.04.3](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-ruby-rack-2.2.7-1.1ubuntu0.25.04.3.md) | Sep 26, 2025 | --- Data as of 2026-11-08T19:12:23Z UTC. 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