CVE-2023-36617

A ReDoS issue was discovered in the URI component before 0.12.2 for Ruby. The URI parser mishandles invalid URLs that have specific characters. There is an increase in execution time for parsing strings to URI objects with rfc2396_parser.rb and rfc3986_parser.rb. NOTE: this issue exists becuse of an incomplete fix for CVE-2023-28755. Version 0.10.3 is also a fixed version.

Published: 2023-06-29 Last update: 2025-11-04 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-36617 is rated Moderate Risk (47.6/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.91%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2023-36617

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-04-19 0.98% 0.91% -0.08%
2 2026-03-04 0.68% 0.98% +0.31%
3 2026-03-01 — 0.68% —

Full EPSS history (51 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-36617

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 3.9 1.4 [email protected]

Weakness enumeration for CVE-2023-36617

GitHub Security Advisory for CVE-2023-36617

GHSA-hww2-5g85-429m · Severity: medium · Ecosystem: rubygems — URI gem has ReDoS vulnerability

OS Trackers for CVE-2023-36617

vendor priority summary link
debian unimportant CVE-2023-36617 unimportant priority: Debian including 4 source packages (jruby, ruby2.7, ruby3.1, rubygems), 11 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 11. https://security-tracker.debian.org/tracker/CVE-2023-36617
redhat medium — https://access.redhat.com/security/cve/CVE-2023-36617
suse high CVE-2023-36617 severity important: SUSE including 77 source package names (libruby2_1-2_1, libruby2_5-2_5, …), 249 product×package rows across 36 product lines (SUSE CaaS Platform 4.0, SUSE Enterprise Storage 7, … (36 product lines)): Known Not Affected 183, Fixed 66. https://www.suse.com/security/cve/CVE-2023-36617/
ubuntu medium CVE-2023-36617 medium priority: Ubuntu including 9 source packages (jruby, ruby1.9.1, …), 117 status rows across 13 suites (bionic, focal, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 77, needs-triage 15, ignored 13, released 8, not-affected 4. https://ubuntu.com/security/CVE-2023-36617

Affected software / configurations for CVE-2023-36617

Vendor Product Version Raw CPE
ruby-lang uri < 0.10.3 cpe:2.3:a:ruby-lang:uri:*:*:*:*:*:ruby:*:*
ruby-lang uri >= 0.11.0, < 0.12.2 cpe:2.3:a:ruby-lang:uri:*:*:*:*:*:ruby:*:*

References for CVE-2023-36617

cvelogic Threat Intelligence