CriticalFix available
ruby — security advisory
An issue was discovered in the OpenSSL library in Ruby before 2.3.8, 2.4.x before 2.4.5, 2.5.x before 2.5.2, and 2.6.x before 2.6.0-preview3. When two OpenSSL::X509::Name objects are compared using ==, depending on the ordering, non-equal objects may return true. When the first argument is one character longer than the second, or the second argument contains a character that is one less than a character in the same position of the first argument, the result of == will be true. This could be leveraged to create an illegitimate certificate that may be accepted as legitimate and then used in signing or encryption operations.
- Products
- ruby
- Affected versions
- Not specified
- Fixed versions
- 2.3.8-r0, 2.4.5-r0, 2.5.2-r0
- CVEs
- CVE-2018-16395
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 21:58 UTC · Revision 1
Source evidence
An issue was discovered in the OpenSSL library in Ruby before 2.3.8, 2.4.x before 2.4.5, 2.5.x before 2.5.2, and 2.6.x before 2.6.0-preview3. When two OpenSSL::X509::Name objects are compared using ==, depending on the ordering, non-equal objects may return true. When the first argument is one character longer than the second, or the second argument contains a character that is one less than a character in the same position of the first argument, the result of == will be true. This could be leveraged to create an illegitimate certificate that may be accepted as legitimate and then used in signing or encryption operations.
osv:ALPINE-CVE-2018-16395
ruby
Fixed versions: 2.5.2-r0
ruby
Fixed versions: 2.5.2-r0
ruby
Fixed versions: 2.5.2-r0
ruby
Fixed versions: 2.5.2-r0
ruby
Fixed versions: 2.5.2-r0
ruby
Fixed versions: 2.5.2-r0
ruby
Fixed versions: 2.5.2-r0
ruby
Fixed versions: 2.5.2-r0
ruby
Fixed versions: 2.5.2-r0
ruby
Fixed versions: 2.5.2-r0
ruby
Fixed versions: 2.5.2-r0
ruby
Fixed versions: 2.5.2-r0
ruby
Fixed versions: 2.5.2-r0
ruby
Fixed versions: 2.5.2-r0
ruby
Fixed versions: 2.3.8-r0
ruby
Fixed versions: 2.3.8-r0
ruby
Fixed versions: 2.4.5-r0
ruby
Fixed versions: 2.4.5-r0
ruby
Fixed versions: 2.5.2-r0
ruby
Fixed versions: 2.5.2-r0
Complete source record
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"modified": "2026-10-23T17:17:55.225601494Z",
"provider": "osv",
"upstream": [
"CVE-2018-16395"
],
"references": [
"https://security.alpinelinux.org/vuln/CVE-2018-16395"
]
},
"related_cves": [
{
"value": "CVE-2018-16395",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 415077,
"published_at": "2018-11-16T18:29:00.943+00:00"
}