CVE-2023-28755

MEDIUMNVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.3 under NVD CVSS v3. EPSS exploit probability: 2.6%, top 16% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
5.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 3%CVSS: 5.3Exploit: NoneExposed: 0

A fix is available — apply it.

A ReDoS issue was discovered in the URI component through 0.12.0 in Ruby through 3.2.1. The URI parser mishandles invalid URLs that have specific characters. It causes an increase in execution time for parsing strings to URI objects. The fixed versions are 0.12.1, 0.11.1, 0.10.2 and 0.10.0.1.

CVSS v3
5.3
EG Score
5.3(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity53% × 45%
Exploitation3% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
84.0%
KEV
Not listed

Published

March 31, 2023

Last Modified

November 4, 2025

References (27)

Patch Availability(13)

Vendor / EcosystemFixed in / PatchReleasedSource
ubunturuby2.3-doc (2.3.1-2~ubuntu16.04.16+esm5) @ xenial2026-05-25ubuntu
ubunturuby2.3-doc (2.3.1-2~ubuntu16.04.16+esm6) @ xenial2026-05-25ubuntu
ubunturuby-rubygems (3.6.3-1ubuntu0.1) @ plucky2026-05-25ubuntu
ubuntulibruby2.7 (2.7.0-5ubuntu1.11) @ focal2026-05-25ubuntu
ubunturuby3.1-dev (3.1.2-6ubuntu0.23.04.1) @ lunar2026-05-25ubuntu
ubuntulibruby2.5 (2.5.1-1ubuntu1.16+esm1) @ bionic2026-05-25ubuntu
redhatruby-0:3.0.7-162.el9_42024-06-11redhat
redhatruby:3.0-8100020240522072634.489197e62024-05-30redhat
redhatruby:3.1-9030020240320163942.92024-04-01redhat
redhatruby:3.1-8090020240311122605.a75119d52024-03-19redhat
redhatruby:2.5-8090020230627084142.b46abd142023-11-14redhat
redhatruby:2.7-8080020230427102918.63b345852023-06-27redhat
redhatrh-ruby27-ruby-0:2.7.8-132.el72023-05-24redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
RubyGems(1)
PackageVulnerable rangeFixed inDependents
uri0.10.00.10.0.1—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(13)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 14× in last 7d / 48× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 105 total refreshes for this CVE.

  1. 2026-07-23 02:21 UTCEG score recompute
  2. 2026-07-22 23:09 UTCEG score recompute
  3. 2026-07-22 14:06 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2023-28755?
CVE-2023-28755 is a medium vulnerability published on March 31, 2023. A ReDoS issue was discovered in the URI component through 0.12.0 in Ruby through 3.2.1. The URI parser mishandles invalid URLs that have specific characters. It causes an increase in execution time for parsing strings to URI objects. The fixed versions are 0.12.1, 0.11.1, 0.10.2 and 0.10.0.1.
When was CVE-2023-28755 disclosed?
CVE-2023-28755 was first published in the National Vulnerability Database on March 31, 2023, with the most recent update on November 4, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-28755 actively exploited?
CVE-2023-28755 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 84.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2023-28755?
CVE-2023-28755 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2023-28755?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-28755, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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