cve.bz

CVE-2026-126351

Addressable: Denial of service in URI path normalization

5.9 mediumFix available

Medium (5.9) in sporkmonger addressable. Fixed in addressable 2.9.1.

On this page
Addressable is an alternative implementation to the URI implementation that is part of Ruby's standard library. Prior to 2.9.1, Addressable::URI.normalize_path repeatedly scans and rewrites paths while removing only one nested dot segment per pass, producing quadratic work. URI#normalize, URI#normalized_path, URI#join, URI#==, and URI#=== inherit the behavior, so processing a sufficiently long attacker-controlled URI can consume a worker thread and cause denial of service on every Ruby implementation. URI.parse alone and code that never normalizes, compares, or joins untrusted URIs are unaffected. This issue is fixed in version 2.9.1.

Severity

CVSS 3.1

5.9 medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
CWE-407 Inefficient Algorithmic Complexity
Published
Assigned by
GitHub_M (CNA)
NVD analysis
Awaiting analysis
Record from
the NVD, synced

Ask an AI about this CVE

Show the promptExplain CVE-2026-126351 for an engineer deciding whether to act. Use https://cve.bz/api/public/cves/CVE-2026-126351?via=ask-ai-copy and https://cve.bz/cve/CVE-2026-126351?via=ask-ai-copy as the source of truth: what is affected and which versions fix it, whether it is in CISA KEV, public exploits, and its EPSS (an internet-wide 30-day estimate of exploitation activity, not a forecast for my systems). If they give no fixed versions, use the CVE record https://cveawg.mitre.org/api/cve/CVE-2026-126351 or the vendor advisory, not third-party mirrors. Tell me how to check whether I am affected and how to verify a fix. Cite the sources and say where they are uncertain.

Opens a third-party assistant; its answer is its own, not cve.bz's. The prompt holds only this CVE's id and public links.

Badge for a README or a site

CVE-2026-126351

An image that stays current: it is drawn from the data each time it is fetched (a host that proxies images, as GitHub does, may show its copy for a while). Markdown:

[![CVE-2026-126351](https://cve.bz/cve/badge/CVE-2026-126351.svg)](https://cve.bz/cve/CVE-2026-126351)

HTML:

<a href="https://cve.bz/cve/CVE-2026-126351"><img src="https://cve.bz/cve/badge/CVE-2026-126351.svg" alt="CVE-2026-126351"></a>

Affected

Versions

From the CNA's record in the CVE List.

ProductAffected
sporkmonger addressable< 2.9.1

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-qq38-m9mg-xjj5RubyGemsaddressable<2.9.12.9.1

References

Check your stackJSON