CVE-2026-42257

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-42257
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42257.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-42257
Aliases
Downstream
Related
Published
2026-05-09T19:39:48.398Z
Modified
2026-07-08T08:13:13.969612959Z
Severity
  • 5.8 (Medium) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N CVSS Calculator
Summary
net-imap: Command Injection via "raw" arguments to multiple commands
Details

Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to versions 0.4.24, 0.5.14, and 0.6.4, several Net::IMAP commands accept a raw string argument that is sent to the server without validation or escaping. If this string is derived from user-controlled input, it may contain contain CRLF sequences, which an attacker can use to inject arbitrary IMAP commands. This issue has been patched in versions 0.4.24, 0.5.14, and 0.6.4.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42257.json",
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-77",
        "CWE-93"
    ]
}
References

Affected packages

Git / github.com/ruby/net-imap

Affected ranges

Type
GIT
Repo
https://github.com/ruby/net-imap
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
24a4e770b43230286a05aa2a9746cdbb3eb8485e
Introduced
cc13c91c65b78ee33ebf4960d547173e761cafdc
Fixed
4063bc1d1d3e21046544ed7a2c131e5f886bab01
Introduced
567518cae5500f7c4776a1fd4e9bbd599e98b9bf
Fixed
3e490673dca65d0cfeeeb3fbf1fdaa188d6f27c4
Database specific 
{
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ],
    "cpe": "cpe:2.3:a:ruby-lang:net\\:\\:imap:*:*:*:*:*:ruby:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "0.4.24"
        },
        {
            "introduced": "0.5.0"
        },
        {
            "fixed": "0.5.14"
        },
        {
            "introduced": "0.6.0"
        },
        {
            "fixed": "0.6.4"
        }
    ]
}

Affected versions

v0.*
v0.1.0
v0.1.1
v0.2.0
v0.2.1
v0.2.2
v0.2.3
v0.3.0
v0.3.1
v0.3.2
v0.3.3
v0.3.4
v0.4.0
v0.4.1
v0.4.10
v0.4.11
v0.4.12
v0.4.13
v0.4.14
v0.4.15
v0.4.16
v0.4.17
v0.4.18
v0.4.19
v0.4.2
v0.4.20
v0.4.21
v0.4.22
v0.4.23
v0.4.3
v0.4.4
v0.4.5
v0.4.6
v0.4.7
v0.4.8
v0.4.9
v0.5.0
v0.5.1
v0.5.10
v0.5.11
v0.5.12
v0.5.13
v0.5.2
v0.5.3
v0.5.4
v0.5.5
v0.5.6
v0.5.7
v0.5.8
v0.5.9
v0.6.0
v0.6.2

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42257.json"