13 Nov 2026 17:56:54 UTC
Addressable: Regular Expression Denial of Service in Addressable templates with certain exploded expressions
cve-program · CVE-2026-126350 · Published
CVE-2026-126350
Addressable: Regular Expression Denial of Service in Addressable templates with certain exploded expressions
CVSS 3.1 5.9 MEDIUMCheck source for fixed versionsKEV status unknown
cve-program · CVE-2026-126350
PublishedAddressable is an alternative implementation to the URI implementation that is part of Ruby's standard library. From 2.3.0 until 2.9.1, URI template expressions using the explode modifier with the slash, dot, semicolon, question-mark, or ampersand operators generate ambiguous regular expressions. When Template#match or Template#extract processes an attacker-controlled URI beginning with the operator's leading character, optional member separators allow catastrophic backtracking and denial of service on MRI Ruby before 3.2 and JRuby. Addressable 2.9.0 incompletely remediated the earlier template issue because its tests did not reach these operator-prefixed paths. URI parsing and Template#expand are unaffected. This issue is fixed in version 2.9.1.
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13 Nov 2026 00:16:18 UTC
Addressable: Regular Expression Denial of Service in Addressable templates with certain exploded expressions
cve-program · CVE-2026-126350 · Published