sporkmonger addressable up to 2.8.x redos

Summaryinfo

A vulnerability marked as problematic has been reported in sporkmonger addressable up to 2.8.x. The impacted element is an unknown function. The manipulation leads to redos. This vulnerability is referenced as CVE-2026-35611. Remote exploitation of the attack is possible. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in sporkmonger addressable up to 2.8.x. This issue affects an unknown code. The manipulation with an unknown input leads to a redos vulnerability. Using CWE to declare the problem leads to CWE-1333. The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles. Impacted is availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-35611 since 04/03/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1449.003 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 305616 (Linux Distros Unpatched Vulnerability : CVE-2026-35611), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 2.9.0 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (305616) and CERT Bund (WID-SEC-2026-1687). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

• IBM License Metric Tool

Productinfo

Vendor

• sporkmonger

Name

• addressable

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8

Website

• Product: https://github.com/sporkmonger/addressable/

CPE 2.3info

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CPE 2.2info

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