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CVE-2026-35611— Addressable has a Regular Expression Denial of Service in Addressable templates

Quick assessment

Affected
sporkmonger addressable
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Addressable是Bob Aman个人开发者的一个Ruby库。 Addressable 2.3.0至2.9.0之前版本存在安全漏洞，该漏洞源于URI模板实现中，两类URI模板生成的正则表达式存在灾难性回溯，可能导致匹配恶意URI时资源消耗失控，导致拒绝服务。

CVSS 7.5 · High EPSS 0.46% · P39
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I. Basic Information for CVE-2026-35611

Vulnerability Information
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Vulnerability Title
Addressable has a Regular Expression Denial of Service in Addressable templates
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1333
Source: CVE Program / CVE List V5
Vulnerability Title
Addressable 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Addressable是Bob Aman个人开发者的一个Ruby库。 Addressable 2.3.0至2.9.0之前版本存在安全漏洞，该漏洞源于URI模板实现中，两类URI模板生成的正则表达式存在灾难性回溯，可能导致匹配恶意URI时资源消耗失控，导致拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
sporkmonger addressable >= 2.3.0, < 2.9.0 -

II. Public POCs for CVE-2026-35611

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III. Intelligence Information for CVE-2026-35611

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Vendor Advisories for CVE-2026-35611 (1)

IV. Related Vulnerabilities

Same product: addressable
Same vendor: sporkmonger
Same weakness: CWE-1333

V. Comments for CVE-2026-35611

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