CVE-2026-35611 - High Severity Vulnerability
Vulnerable Library - addressable-2.8.6.gem
Addressable is an alternative implementation to the URI implementation that is
part of Ruby's standard library. It is flexible, offers heuristic parsing, and
additionally provides extensive support for IRIs and URI templates.
Library home page: https://rubygems.org/gems/addressable-2.8.6.gem
Path to dependency file: /Gemfile.lock
Path to vulnerable library: /home/wss-scanner/.gem/ruby/3.2.0/cache/addressable-2.8.6.gem
Dependency Hierarchy:
- jekyll-4.3.3.gem (Root Library)
- ❌ addressable-2.8.6.gem (Vulnerable Library)
Found in base branch: master
Vulnerability Details
Addressable is an alternative implementation to the URI implementation that is part of Ruby's standard library. From 2.3.0 to before 2.9.0, within the URI template implementation in Addressable, two classes of URI template generate regular expressions vulnerable to catastrophic backtracking. Templates using the * (explode) modifier with any expansion operator (e.g., {foo*}, {+var*}, {#var*}, {/var*}, {.var*}, {;var*}, {?var*}, {&var*}) generate patterns with nested unbounded quantifiers that are O(2^n) when matched against a maliciously crafted URI. Templates using multiple variables with the + or # operators (e.g., {+v1,v2,v3}) generate patterns with O(n^k) complexity due to the comma separator being within the matched character class, causing ambiguous backtracking across k variables. When matched against a maliciously crafted URI, this can result in catastrophic backtracking and uncontrolled resource consumption, leading to denial of service. This vulnerability is fixed in 2.9.0.
Publish Date: 2026-04-07
URL: CVE-2026-35611
CVSS 3 Score Details (7.5)
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: None
- Availability Impact: High
For more information on CVSS3 Scores, click here.
Suggested Fix
Type: Upgrade version
Origin: GHSA-h27x-rffw-24p4
Release Date: 2026-04-07
Fix Resolution: addressable - 2.9.0
Step up your Open Source Security Game with Mend here
CVE-2026-35611 - High Severity Vulnerability
Addressable is an alternative implementation to the URI implementation that is part of Ruby's standard library. It is flexible, offers heuristic parsing, and additionally provides extensive support for IRIs and URI templates.
Library home page: https://rubygems.org/gems/addressable-2.8.6.gem
Path to dependency file: /Gemfile.lock
Path to vulnerable library: /home/wss-scanner/.gem/ruby/3.2.0/cache/addressable-2.8.6.gem
Dependency Hierarchy:
Found in base branch: master
Addressable is an alternative implementation to the URI implementation that is part of Ruby's standard library. From 2.3.0 to before 2.9.0, within the URI template implementation in Addressable, two classes of URI template generate regular expressions vulnerable to catastrophic backtracking. Templates using the * (explode) modifier with any expansion operator (e.g., {foo*}, {+var*}, {#var*}, {/var*}, {.var*}, {;var*}, {?var*}, {&var*}) generate patterns with nested unbounded quantifiers that are O(2^n) when matched against a maliciously crafted URI. Templates using multiple variables with the + or # operators (e.g., {+v1,v2,v3}) generate patterns with O(n^k) complexity due to the comma separator being within the matched character class, causing ambiguous backtracking across k variables. When matched against a maliciously crafted URI, this can result in catastrophic backtracking and uncontrolled resource consumption, leading to denial of service. This vulnerability is fixed in 2.9.0.
Publish Date: 2026-04-07
URL: CVE-2026-35611
Base Score Metrics:
- Exploitability Metrics:
- Attack Vector: Network
- Attack Complexity: Low
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
- Impact Metrics:
- Confidentiality Impact: None
- Integrity Impact: None
- Availability Impact: High
For more information on CVSS3 Scores, click here.Type: Upgrade version
Origin: GHSA-h27x-rffw-24p4
Release Date: 2026-04-07
Fix Resolution: addressable - 2.9.0
Step up your Open Source Security Game with Mend here