CVE-2023-28756 — Vulnerability in time — CVE Details
HIGH
Ruby Time component ReDoS issue
Published March 31, 2023Updated September 10, 2026Source: osv
Summary
A ReDoS issue was discovered in the Time component through 0.2.1 in Ruby through 3.2.1. The Time parser mishandles invalid URLs that have specific characters. It causes an increase in execution time for parsing strings to Time objects. The fixed versions are 0.1.1 and 0.2.2.
Advisory Timeline
- First published March 31, 2023 (1291 days ago).
- Last revised September 10, 2026 — 1259 days after initial publication.
Remediation
Upgrade to the fixed version using your package manager.
Bundler
Update time to 0.2.2 or latergem install time -v 0.2.2
Bundler
Update time to 0.1.1 or latergem install time -v 0.1.1
After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.
Affected Packages (2)
Affects 1 ecosystem: rubygems (1).
Vulnerability Classification
Common Weakness Enumeration (CWE) identifiers for this vulnerability type.
- CWE-1333
CVSS Score Breakdown
What the CVSS (Common Vulnerability Scoring System) 7.5 score means for each attack dimension.
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- https://nvd.nist.gov/vuln/detail/CVE-2023-28756ADVISORY
- https://www.ruby-lang.org/en/news/2023/03/30/redos-in-time-cve-2023-28756WEB
- https://www.ruby-lang.org/en/news/2022/12/25/ruby-3-2-0-releasedWEB
- https://www.ruby-lang.org/en/downloads/releasesWEB
- https://security.netapp.com/advisory/ntap-20230526-0004WEB
- https://security.gentoo.org/glsa/202401-27WEB
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WMIOPLBAAM3FEQNAXA2L7BDKOGSVUT5ZWEB
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/G76GZG3RAGYF4P75YY7J7TGYAU7Z5E2TWEB
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FFZANOQA4RYX7XCB42OO3P24DQKWHEKAWEB
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WMIOPLBAAM3FEQNAXA2L7BDKOGSVUT5ZWEB
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/G76GZG3RAGYF4P75YY7J7TGYAU7Z5E2TWEB
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FFZANOQA4RYX7XCB42OO3P24DQKWHEKAWEB
- https://lists.debian.org/debian-lts-announce/2024/09/msg00000.htmlWEB
- https://lists.debian.org/debian-lts-announce/2023/04/msg00033.htmlWEB
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/time/CVE-2023-28756.ymlWEB
- https://github.com/ruby/time/releasesWEB
- https://github.com/ruby/timePACKAGE
Frequently Asked Questions
- What is CVE-2023-28756?
- Ruby Time component ReDoS issue This vulnerability has been assigned a severity rating of HIGH (CVSS score: 7.5/10).
- How do I check if my project is affected by CVE-2023-28756?
- CVE-2023-28756 affects time. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2023-28756 and 200,000+ other known vulnerabilities.
Severity & Exploitability
CVSS Score
7.5
High exploitability or significant impact. Prioritize remediation within days.
Also Known As
GHSA-fg7x-g82r-94qc
BIT-ruby-2023-28756
BIT-ruby-min-2023-28756
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