VulnerableCode Package Details - pkg:gem/addressable@2.3.0

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Vulnerability	Summary	Fixed by
VCID-3gf5-n8s3-z7au Aliases: CVE-2021-32740 GHSA-jxhc-q857-3j6g	denial of service	2.8.0 Affected by 1 other vulnerability. This version is affected by these other vulnerabilities: {{ fixed_by_vuln.vulnerability_id }}
VCID-76tz-cfbv-wues Aliases: CVE-2026-35611 GHSA-h27x-rffw-24p4	Addressable has a Regular Expression Denial of Service in Addressable templates ### Impact Within the URI template implementation in Addressable, two classes of URI template generate regular expressions vulnerable to catastrophic backtracking: 1. 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. 2. 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. The first pattern was partially addressed in 2.8.10 for certain operator combinations. Both patterns are fully remediated in 2.9.0. Users of the URI parsing capabilities in Addressable but not the URI template matching capabilities are unaffected. ### Affected Versions This vulnerability affects Addressable >= 2.3.0 (note: 2.3.0 and 2.3.1 were yanked; the earliest installable release is 2.3.2). It was partially fixed in version 2.8.10 and fully remediated in 2.9.0. The vulnerability is more exploitable on MRI Ruby < 3.2 and on all versions of JRuby and TruffleRuby. MRI Ruby 3.2 and later ship with Onigmo 6.9, which introduces memoization that prevents catastrophic backtracking for the first class of template. JRuby and TruffleRuby do not implement equivalent memoization and remain vulnerable to all patterns. This has been confirmed on the following runtimes: \| Runtime \| Status \| \|--------------\|--------\| \| MRI Ruby 2.6 \| Vulnerable \| \| MRI Ruby 2.7 \| Vulnerable \| \| MRI Ruby 3.0 \| Vulnerable \| \| MRI Ruby 3.1 \| Vulnerable \| \| MRI Ruby 3.2 \| Partially vulnerable \| \| MRI Ruby 3.3 \| Partially vulnerable \| \| MRI Ruby 3.4 \| Partially vulnerable \| \| MRI Ruby 4.0 \| Partially vulnerable \| \| JRuby 10.0 \| Vulnerable \| \| TruffleRuby 21.2 \| Vulnerable \| ### Workarounds - Upgrade to MRI Ruby 3.2 or later, if your application does not use JRuby or TruffleRuby. The Onigmo memoization introduced in MRI Ruby 3.2 prevents catastrophic backtracking from nested unbounded quantifiers (pattern 1 above — templates using the `` modifier). It does not reliably mitigate the O(n^k) multi-variable case (pattern 2), so upgrading Ruby alone may not be sufficient if your templates use `{+v1,v2,...}` or `{#v1,v2,...}` syntax. - Avoid using vulnerable template patterns when matching user-supplied input on unpatched versions of the library: - Templates using the `` (explode) modifier: `{foo}`, `{+var}`, `{#var}`, `{.var}`, `{/var}`, `{;var}`, `{?var}`, `{&var}` - Templates using multiple variables with the `+` or `#` operators: `{+v1,v2}`, `{#v1,v2,v3}`, etc. - Apply a short timeout* around any call to `Template#match` or `Template#extract` that processes user-supplied data. ### Credits Discovered in collaboration with @jamfish. ### For more information If you have any questions or comments about this advisory: * [Open an issue](https://github.com/sporkmonger/addressable/issues)	2.9.0 Affected by 0 other vulnerabilities.

Vulnerability

Summary

Fixed by

VCID-3gf5-n8s3-z7au
Aliases:
CVE-2021-32740
GHSA-jxhc-q857-3j6g

denial of service

2.8.0
Affected by 1 other vulnerability.

VCID-76tz-cfbv-wues
Aliases:
CVE-2026-35611
GHSA-h27x-rffw-24p4

Addressable has a Regular Expression Denial of Service in Addressable templates ### Impact Within the URI template implementation in Addressable, two classes of URI template generate regular expressions vulnerable to catastrophic backtracking: 1. 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. 2. 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. The first pattern was partially addressed in 2.8.10 for certain operator combinations. Both patterns are fully remediated in 2.9.0. Users of the URI parsing capabilities in Addressable but not the URI template matching capabilities are unaffected. ### Affected Versions This vulnerability affects Addressable >= 2.3.0 (note: 2.3.0 and 2.3.1 were yanked; the earliest installable release is 2.3.2). It was partially fixed in version 2.8.10 and fully remediated in 2.9.0. The vulnerability is more exploitable on MRI Ruby < 3.2 and on all versions of JRuby and TruffleRuby. MRI Ruby 3.2 and later ship with Onigmo 6.9, which introduces memoization that prevents catastrophic backtracking for the first class of template. JRuby and TruffleRuby do not implement equivalent memoization and remain vulnerable to all patterns. This has been confirmed on the following runtimes: | Runtime | Status | |--------------|--------| | MRI Ruby 2.6 | Vulnerable | | MRI Ruby 2.7 | Vulnerable | | MRI Ruby 3.0 | Vulnerable | | MRI Ruby 3.1 | Vulnerable | | MRI Ruby 3.2 | Partially vulnerable | | MRI Ruby 3.3 | Partially vulnerable | | MRI Ruby 3.4 | Partially vulnerable | | MRI Ruby 4.0 | Partially vulnerable | | JRuby 10.0 | Vulnerable | | TruffleRuby 21.2 | Vulnerable | ### Workarounds - **Upgrade to MRI Ruby 3.2 or later**, if your application does not use JRuby or TruffleRuby. The Onigmo memoization introduced in MRI Ruby 3.2 prevents catastrophic backtracking from nested unbounded quantifiers (pattern 1 above — templates using the `*` modifier). It does not reliably mitigate the O(n^k) multi-variable case (pattern 2), so upgrading Ruby alone may not be sufficient if your templates use `{+v1,v2,...}` or `{#v1,v2,...}` syntax. - **Avoid using vulnerable template patterns** when matching user-supplied input on unpatched versions of the library: - Templates using the `*` (explode) modifier: `{foo*}`, `{+var*}`, `{#var*}`, `{.var*}`, `{/var*}`, `{;var*}`, `{?var*}`, `{&var*}` - Templates using multiple variables with the `+` or `#` operators: `{+v1,v2}`, `{#v1,v2,v3}`, etc. - **Apply a short timeout** around any call to `Template#match` or `Template#extract` that processes user-supplied data. ### Credits Discovered in collaboration with @jamfish. ### For more information If you have any questions or comments about this advisory: * [Open an issue](https://github.com/sporkmonger/addressable/issues)

2.9.0
Affected by 0 other vulnerabilities.

Vulnerability	Summary	Aliases
This package is not known to fix vulnerabilities.

Vulnerability

Summary

Aliases

This package is not known to fix vulnerabilities.

Date	Actor	Action	Vulnerability	Source	VulnerableCode Version
2026-06-04T16:14:39.255991+00:00	Ruby Importer	Affected by	VCID-3gf5-n8s3-z7au	https://github.com/rubysec/ruby-advisory-db/blob/master/gems/addressable/CVE-2021-32740.yml	38.6.0
2026-06-04T16:14:39.241859+00:00	Ruby Importer	Affected by	VCID-76tz-cfbv-wues	https://github.com/rubysec/ruby-advisory-db/blob/master/gems/addressable/CVE-2026-35611.yml	38.6.0
2026-06-02T04:39:28.669447+00:00	GitLab Importer	Affected by	VCID-3gf5-n8s3-z7au	https://gitlab.com/gitlab-org/advisories-community/-/blob/main/gem/addressable/CVE-2021-32740.yml	38.6.0