No exploitation reportedFix available

CVE-2023-36617

Q: Is CVE-2023-36617 actively exploited?

Active exploitation of CVE-2023-36617 has not been confirmed. Its EPSS score was 1.7% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2023-36617?

CVE-2023-36617 has a CVSS v3 base score of 5.3 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

No exploitation reported by the sources we read.

Published2023-06-29
Fixed in0.12.2 · 0.11.2 · 0.10.3 · 0.10.0.3
WeaknessCWE-1333

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC

2023-06-2913:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-36617?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-36617?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV

Ruby-lang uri

Branch	Affected	Fixed in	Source
0.x	≥ 0.11.0, < 0.12.2	0.12.2	NVD
0.12	≥ 0.12.0, < 0.12.2	0.12.2	OSV
0.11	≥ 0.11.0, < 0.11.2	0.11.2	OSV
0.10	< 0.10.3	0.10.3	NVD
0.10	≥ 0.10.1, < 0.10.3	0.10.3	OSV
0.10	< 0.10.0.3	0.10.0.3	OSV

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

rubyAlmaLinux:9all versions · fixed in 3.1.4-143.module_el9.3.0+60+5ebc989aand 5 other packages
rubyAlmaLinux:8all versions · fixed in 2.5.9-112.module_el8.10.0+3871+342e2c2fand 4 other packages
rubyAlmaLinux:8all versions · fixed in 3.1.4-142.module_el8.9.0+3746+91b8233aand 5 other packages
rubygem-abrtAlmaLinux:8all versions · fixed in 0.3.0-4.module_el8.10.0+3871+342e2c2fand 1 other package
rubygem-abrtAlmaLinux:8all versions · fixed in 0.4.0-1.module_el8.7.0+3304+9392e77fand 1 other package
rubygem-bigdecimalAlmaLinux:9all versions · fixed in 3.1.1-143.module_el9.3.0+60+5ebc989a
rubygem-bigdecimalAlmaLinux:8all versions · fixed in 1.3.4-112.module_el8.10.0+3871+342e2c2f
rubygem-bigdecimalAlmaLinux:8all versions · fixed in 3.1.1-142.module_el8.9.0+3746+91b8233a

56 more package ranges on OSV.dev

Full record on NVD

Fix

Update Ruby-lang uri to 0.12.2 · 0.11.2 · 0.10.3 · 0.10.0.3

Advisories and patches

www.ruby-lang.orgMitigation · Vendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.15.3read 2026-10-23
NVDweakness (CWE)CWE-1333read 2026-10-23
FIRST EPSSEPSS score1.7 %2026-10-23
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Published: 2023-06-29
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2023-36617?

Is CVE-2023-36617 actively exploited?

Active exploitation of CVE-2023-36617 has not been confirmed. Its EPSS score was 1.7% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-36617?

CVE-2023-36617 has a CVSS v3 base score of 5.3 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

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Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

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