# CVE-2026-126354: Addressable URI normalization resolves some dotted path segments to the wrong path

Status: published. Published: 2026-11-12. Updated: 2026-11-12.

Addressable is an alternative implementation to the URI implementation that is part of Ruby's standard library. From 2.2.5 until 2.9.1, Addressable::URI.normalize_path can resolve a path containing leading parent segments and later parent segments to a different path than an RFC 3986 resolver. URI#normalize, URI#join, URI#==, and URI#=== inherit the result. An application that authorizes the Addressable-normalized path but sends the original URI to another resolver can allow access outside the intended path allowlist. Applications that use the same normalized value for authorization and the request, or reject parent segments, are unaffected. This issue is fixed in version 2.9.1.

## Remediation

- fix: addressable (RubyGems): OSV reports a fixed version 2.9.1. Check the advisory for supported release branches. (source: OSV GHSA-8gmh-2hhj-2hv9) — https://github.com/advisories/GHSA-8gmh-2hhj-2hv9

## Affected products and versions

- sporkmonger / addressable: >= 2.2.5, < 2.9.1 (affected). Source: CNA: GitHub_M
-  / addressable (addressable): 2.2.5 (affected, RubyGems); 2.2.6 (affected, RubyGems); 2.2.7 (affected, RubyGems); 2.2.8 (affected, RubyGems); 2.3.2 (affected, RubyGems); 2.3.3 (affected, RubyGems); 2.3.4 (affected, RubyGems); 2.3.5 (affected, RubyGems); 2.3.6 (affected, RubyGems); 2.3.7 (affected, RubyGems); 2.3.8 (affected, RubyGems); 2.4.0 (affected, RubyGems); 2.5.0 (affected, RubyGems); 2.5.1 (affected, RubyGems); 2.5.2 (affected, RubyGems); 2.6.0 (affected, RubyGems); 2.7.0 (affected, RubyGems); 2.8.0 (affected, RubyGems); 2.8.1 (affected, RubyGems); 2.8.10 (affected, RubyGems); 2.8.2 (affected, RubyGems); 2.8.3 (affected, RubyGems); 2.8.4 (affected, RubyGems); 2.8.5 (affected, RubyGems); 2.8.6 (affected, RubyGems); 2.8.7 (affected, RubyGems); 2.8.8 (affected, RubyGems); 2.8.9 (affected, RubyGems); 2.9.0 (affected, RubyGems); Ecosystem version events: introduced 2.2.5; fixed 2.9.1. Source: OSV GHSA-8gmh-2hhj-2hv9

## Severity and prioritization

- CVSS 3.1: 4.8 (medium); CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N; source: CNA: GitHub_M

- CVSS 3.1: 4.8 (medium); CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N; source: NVD: security-advisories@github.com

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-22, CWE-436

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/sporkmonger/addressable/security/advisories/GHSA-8gmh-2hhj-2hv9 (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/sporkmonger/addressable/commit/25c7c412a2f7e06c3cac92872e831f6d053703c5 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/sporkmonger/addressable/releases/tag/addressable-2.9.1 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/sporkmonger/addressable/commit/25c7c412a2f7e06c3cac92872e831f6d053703c5 (security-advisories@github.com)

- https://github.com/sporkmonger/addressable/releases/tag/addressable-2.9.1 (security-advisories@github.com)

- https://github.com/sporkmonger/addressable/security/advisories/GHSA-8gmh-2hhj-2hv9 (security-advisories@github.com)

- https://github.com/advisories/GHSA-8gmh-2hhj-2hv9 (OSV / GitHub Security Advisories; advisory)

- https://osv.dev/vulnerability/GHSA-8gmh-2hhj-2hv9 (OSV / GitHub Security Advisories; osv)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-126354; retrieved 2026-11-12; source updated 2026-11-12

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-126354; retrieved 2026-11-13; source updated 2026-11-12

- OSV / GitHub Security Advisories: https://osv.dev/vulnerability/GHSA-8gmh-2hhj-2hv9; retrieved 2026-11-12; source updated 2026-11-12

Revision: 973e2ba988cbc02e78bd2aedd7a670efafa30fab06aea2c3c8c5623a117dfa1a

Canonical: https://y2.dev/cve/CVE-2026-126354

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