Addressable display_uri can show misleading hosts containing bidi and invisible characters

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-126349
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-12 22:19:20 UTC
Updated2026-11-12 22:19:20 UTC
DescriptionAddressable is an alternative implementation to the URI implementation that is part of Ruby's standard library. From 2.0.0 until 2.9.1, Addressable::IDNA.to_unicode can decode Punycode labels that contain bidirectional controls, zero-width characters, control characters, or other default-ignorable format characters. Addressable::URI#display_uri can consequently show a reordered or visually indistinguishable hostname even though host, normalized_host, and network connections use the original encoded hostname. The pure-Ruby backend accepts the full prohibited set, while the native libidn backend is affected from 2.5.2 for characters added after Unicode 3.2. This issue is fixed in version 2.9.1.

Risk And Classification

Primary CVSS: v3.1 3.1 LOW from [email protected]

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N

Problem Types: CWE-176 | CWE-451 | CWE-1007 | CWE-176 CWE-176: Improper Handling of Unicode Encoding | CWE-451 CWE-451: User Interface (UI) Misrepresentation of Critical Information | CWE-1007 CWE-1007: Insufficient Visual Distinction of Homoglyphs Presented to User

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary3.1LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
3.1CNADECLARED3.1LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Sporkmonger Addressable affected >= 2.0.0, < 2.9.1 Not specified

References

ReferenceSourceLinkTags
github.com/sporkmonger/addressable/releases/tag/addressable-2.9.1 [email protected] github.com
github.com/sporkmonger/addressable/security/advisories/GHSA-539f-xcgw-2gjg [email protected] github.com
github.com/sporkmonger/addressable/commit/60455d32bb59fda2585a0e1865a9fc... [email protected] github.com
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