DEBIAN-CVE-2026-35611
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.
DEBIAN-CVE-2026-35611
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-35611
ruby-addressable
Source reference: /affected/0/package/name
- Affected versions
- 2.8.1-1
Source reference:
/affected/0/versions2.8.5-1Source reference:
/affected/0/versions2.8.7-2Source reference:
/affected/0/versions2.8.8-1Source reference:
/affected/0/versions2.8.9-1Source reference:
/affected/0/versions2.9.0-1Source reference:
/affected/0/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
ruby-addressable
Source reference: /affected/1/package/name
- Affected versions
- 2.8.7-2
Source reference:
/affected/1/versions2.8.8-1Source reference:
/affected/1/versions2.8.9-1Source reference:
/affected/1/versions2.9.0-1Source reference:
/affected/1/versions - Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
ruby-addressable
Source reference: /affected/2/package/name
- Affected versions
- 2.8.7-2
Source reference:
/affected/2/versions2.8.8-1Source reference:
/affected/2/versions2.8.9-1Source reference:
/affected/2/versions - Fixed versions
- 2.9.0-1
Source reference:
/affected/2/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "ruby-addressable",
"purl": "pkg:deb/debian/ruby-addressable?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"2.8.1-1",
"2.8.5-1",
"2.8.7-2",
"2.8.8-1",
"2.8.9-1",
"2.9.0-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-35611.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "ruby-addressable",
"purl": "pkg:deb/debian/ruby-addressable?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"2.8.7-2",
"2.8.8-1",
"2.8.9-1",
"2.9.0-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-35611.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.9.0-1"
}
]
}
],
"package": {
"name": "ruby-addressable",
"purl": "pkg:deb/debian/ruby-addressable?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"2.8.7-2",
"2.8.8-1",
"2.8.9-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-35611.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #55993 · Revision 1
- Added to Heist Feed
- Publisher date