CVE-2026-42245

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Source
https://cve.org/CVERecord?id=CVE-2026-42245
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42245.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-42245
Aliases
Downstream
BELL (1)
CGA (133)
CLEANSTART (3)
DEBIAN (1)
ECHO (1)
MINI (17)
OESA (1)
RHSA (12)
RLSA (5)
UBUNTU (1)
Related
ALSA (5)
Published
2026-05-09T19:37:08Z
Modified
2026-10-21T02:30:22Z
Severity
  • 2.3 (Low) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N CVSS Calculator
Summary
net-imap: Quadratic complexity when reading response literals
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, Net::IMAP::ResponseReader has quadratic time complexity when reading large responses containing many string literals. A hostile server can send responses which are crafted to exhaust the client's CPU for a denial of service attack. This issue has been patched in versions 0.4.24, 0.5.14, and 0.6.4.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-407"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42245.json"
}
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
Fixed
6091f7d6b1f3514cafbfe39c76f2b5d73de3ca96
Fixed
88d95231fc8afef11c1f074453f7d75b68c9dfda
Fixed
de685f91a4a4cc75eb80da898c2bf8af08d34819
Database specific
Show details 
{
    "extracted_events":  [
        {
            "cpe":  "cpe:2.3:a:ruby-lang:net\\:\\:imap:*:*:*:*:*:ruby:*:*",
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "fixed":  "0.4.24"
                }
            ],
            "source":  "CPE_RANGE"
        },
        {
            "cpe":  "cpe:2.3:a:ruby-lang:net\\:\\:imap:*:*:*:*:*:ruby:*:*",
            "range":  [
                {
                    "introduced":  "0.5.0"
                },
                {
                    "fixed":  "0.5.14"
                }
            ],
            "source":  "CPE_RANGE"
        },
        {
            "cpe":  "cpe:2.3:a:ruby-lang:net\\:\\:imap:*:*:*:*:*:ruby:*:*",
            "range":  [
                {
                    "introduced":  "0.6.0"
                },
                {
                    "fixed":  "0.6.4"
                }
            ],
            "source":  "CPE_RANGE"
        },
        {
            "range":  [
                {
                    "fixed":  "6091f7d6b1f3514cafbfe39c76f2b5d73de3ca96"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        },
        {
            "range":  [
                {
                    "fixed":  "88d95231fc8afef11c1f074453f7d75b68c9dfda"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        },
        {
            "range":  [
                {
                    "fixed":  "de685f91a4a4cc75eb80da898c2bf8af08d34819"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        },
        {
            "original_tag":  "v0.4.24",
            "range":  [
                {
                    "fixed":  "24a4e770b43230286a05aa2a9746cdbb3eb8485e"
                }
            ],
            "source":  "REFERENCES_TAG"
        },
        {
            "original_tag":  "v0.5.14",
            "range":  [
                {
                    "fixed":  "4063bc1d1d3e21046544ed7a2c131e5f886bab01"
                }
            ],
            "source":  "REFERENCES_TAG"
        },
        {
            "original_tag":  "v0.6.4",
            "range":  [
                {
                    "fixed":  "3e490673dca65d0cfeeeb3fbf1fdaa188d6f27c4"
                }
            ],
            "source":  "REFERENCES_TAG"
        }
    ]
}

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-2026-42245.json"