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17 vulnerabilities found for net-imap by ruby
CVE-2026-47242 (GCVE-0-2026-47242)
Vulnerability from cvelistv5 – Published: 2026-06-22 20:19 – Updated: 2026-06-22 20:19
VLAI
Title
Net::IMAP: Command Injection via ID command argument
Summary
Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to 0.6.5 and 0.5.15, when Net::IMAP#id is called with a hash argument, although the ID field value strings are correctly quoted (escaping quoted specials), they were not validated to prohibit CRLF sequences. While Net::IMAP#enable does process its arguments for aliases, it does not validate them as valid atoms (or as a list of valid atoms). The #to_s value is sent verbatim. Arguments to either command could be used by an attacker to inject arbitrary IMAP commands. This vulnerability is fixed in 0.6.5 and 0.5.15.
Severity
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/ruby/net-imap/security/advisor… | x_refsource_CONFIRM |
Impacted products
{
"containers": {
"cna": {
"affected": [
{
"product": "net-imap",
"vendor": "ruby",
"versions": [
{
"status": "affected",
"version": "\u003e= 0.6.0, \u003c 0.6.4.1"
},
{
"status": "affected",
"version": "\u003c 0.5.15"
}
]
}
],
"descriptions": [
{
"lang": "en",
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}
],
"metrics": [
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"attackRequirements": "PRESENT",
"attackVector": "LOCAL",
"baseScore": 5.8,
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"privilegesRequired": "NONE",
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"subConfidentialityImpact": "NONE",
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"userInteraction": "PASSIVE",
"vectorString": "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",
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{
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}
]
},
{
"descriptions": [
{
"cweId": "CWE-93",
"description": "CWE-93: Improper Neutralization of CRLF Sequences (\u0027CRLF Injection\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
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"x_refsource_CONFIRM"
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}
],
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"discovery": "UNKNOWN"
},
"title": "Net::IMAP: Command Injection via ID command argument"
}
},
"cveMetadata": {
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"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-47240 (GCVE-0-2026-47240)
Vulnerability from cvelistv5 – Published: 2026-06-22 20:17 – Updated: 2026-06-22 20:17
VLAI
Title
Net::IMAP: Command Injection via non-synchronizing literal in "raw" argument
Summary
Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to 0.6.5 and 0.5.15, several Net::IMAP commands accept a "raw data" argument that is sent verbatim after validation to prevent command injection. However, if a server does not support non-synchronizing literals, it may still be possible to inject arbitrary IMAP commands inside non-synchronizing literals. A server without support for non-synchronizing literals may interpret the "+}\r\n" as the end of a malformed command line and respond with a tagged BAD. In that case, the contents of the literal will be interpreted as one or more new pipelined commands, allowing a CRLF command injection attack to succeed. This affects criteria for #search and #uid_search; search_keys for #sort, #thread, #uid_sort, and #uid_thread; and attr for #fetch and #uid_fetch. This vulnerability is fixed in 0.6.5 and 0.5.15.
Severity
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/ruby/net-imap/security/advisor… | x_refsource_CONFIRM |
Impacted products
{
"containers": {
"cna": {
"affected": [
{
"product": "net-imap",
"vendor": "ruby",
"versions": [
{
"status": "affected",
"version": "\u003e= 0.6.0, \u003c 0.6.4.1"
},
{
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"version": "\u003c 0.5.15"
}
]
}
],
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}
],
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"attackRequirements": "PRESENT",
"attackVector": "LOCAL",
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}
]
},
{
"descriptions": [
{
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"description": "CWE-93: Improper Neutralization of CRLF Sequences (\u0027CRLF Injection\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
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}
],
"source": {
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"discovery": "UNKNOWN"
},
"title": "Net::IMAP: Command Injection via non-synchronizing literal in \"raw\" argument"
}
},
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},
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}
CVE-2026-47241 (GCVE-0-2026-47241)
Vulnerability from cvelistv5 – Published: 2026-06-22 20:11 – Updated: 2026-06-22 20:11
VLAI
Title
Net::IMAP: Denial of Service via incomplete raw argument validation
Summary
Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to 0.6.5 and 0.5.15, several Net::IMAP commands accept a raw string argument which is only validated to prevent CRLF injection and then sent verbatim. If this string is derived from user-controlled input, an attacker can force the next command to be absorbed as a continuation of the first command. This will cause the first command to eventually fail, but also prevents it from returning until another command is sent (from another thread). That other command will not return until the connection is closed. This vulnerability is fixed in 0.6.5 and 0.5.15.
Severity
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/ruby/net-imap/security/advisor… | x_refsource_CONFIRM |
Impacted products
{
"containers": {
"cna": {
"affected": [
{
"product": "net-imap",
"vendor": "ruby",
"versions": [
{
"status": "affected",
"version": "\u003e= 0.6.0, \u003c 0.6.4.1"
},
{
"status": "affected",
"version": "\u003c 0.5.15"
}
]
}
],
"descriptions": [
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}
],
"metrics": [
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"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"baseScore": 2.1,
"baseSeverity": "LOW",
"privilegesRequired": "LOW",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "PASSIVE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
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}
}
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{
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"cweId": "CWE-162",
"description": "CWE-162: Improper Neutralization of Trailing Special Elements",
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}
]
},
{
"descriptions": [
{
"cweId": "CWE-182",
"description": "CWE-182: Collapse of Data into Unsafe Value",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-186",
"description": "CWE-186: Overly Restrictive Regular Expression",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
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CVE-2026-42258 (GCVE-0-2026-42258)
Vulnerability from cvelistv5 – Published: 2026-05-09 19:40 – Updated: 2026-05-11 14:57
VLAI
Title
net-imap: Command Injection via unvalidated Symbol inputs
Summary
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, symbol arguments to commands are vulnerable to a CRLF Injection / IMAP Command injection via Symbol arguments passed to IMAP commands. This issue has been patched in versions 0.4.24, 0.5.14, and 0.6.4.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/ruby/net-imap/security/advisor… | x_refsource_CONFIRM |
| https://github.com/ruby/net-imap/releases/tag/v0.4.24 | x_refsource_MISC |
| https://github.com/ruby/net-imap/releases/tag/v0.5.14 | x_refsource_MISC |
| https://github.com/ruby/net-imap/releases/tag/v0.6.4 | x_refsource_MISC |
Impacted products
{
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{
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],
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"timestamp": "2026-05-11T14:57:16.635329Z",
"version": "2.0.3"
},
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}
}
],
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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},
"title": "CISA ADP Vulnrichment"
}
],
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{
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"vendor": "ruby",
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},
{
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},
{
"status": "affected",
"version": "\u003e= 0.6.0, \u003c 0.6.4"
}
]
}
],
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}
],
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},
{
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"type": "CWE"
}
]
}
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{
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{
"name": "https://github.com/ruby/net-imap/releases/tag/v0.4.24",
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{
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"url": "https://github.com/ruby/net-imap/releases/tag/v0.6.4"
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"title": "net-imap: Command Injection via unvalidated Symbol inputs"
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CVE-2026-42257 (GCVE-0-2026-42257)
Vulnerability from cvelistv5 – Published: 2026-05-09 19:39 – Updated: 2026-05-13 19:33
VLAI
Title
net-imap: Command Injection via "raw" arguments to multiple commands
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/ruby/net-imap/security/advisor… | x_refsource_CONFIRM |
| https://github.com/ruby/net-imap/releases/tag/v0.4.24 | x_refsource_MISC |
| https://github.com/ruby/net-imap/releases/tag/v0.5.14 | x_refsource_MISC |
| https://github.com/ruby/net-imap/releases/tag/v0.6.4 | x_refsource_MISC |
Impacted products
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}
],
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"timestamp": "2026-05-13T19:27:16.888782Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
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{
"product": "net-imap",
"vendor": "ruby",
"versions": [
{
"status": "affected",
"version": "\u003c 0.4.24"
},
{
"status": "affected",
"version": "\u003e= 0.5.0, \u003c 0.5.14"
},
{
"status": "affected",
"version": "\u003e= 0.6.0, \u003c 0.6.4"
}
]
}
],
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{
"lang": "en",
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}
],
"metrics": [
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"attackRequirements": "PRESENT",
"attackVector": "LOCAL",
"baseScore": 5.8,
"baseSeverity": "MEDIUM",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "PASSIVE",
"vectorString": "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",
"version": "4.0",
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}
}
],
"problemTypes": [
{
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{
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"description": "CWE-93: Improper Neutralization of CRLF Sequences (\u0027CRLF Injection\u0027)",
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"type": "CWE"
}
]
},
{
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CVE-2026-42256 (GCVE-0-2026-42256)
Vulnerability from cvelistv5 – Published: 2026-05-09 19:38 – Updated: 2026-05-11 17:04
VLAI
Title
net-imap: Denial of service via high iteration count for `SCRAM-*` authentication
Summary
Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. From versions 0.4.0 to before 0.4.24, 0.5.0 to before 0.5.14, and 0.6.0 to before 0.6.4, when authenticating a connection with SCRAM-SHA1 or SCRAM-SHA256, a hostile server can perform a computational denial-of-service attack on the client process by sending a big iteration count value. This issue has been patched in versions 0.4.24, 0.5.14, and 0.6.4.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://github.com/ruby/net-imap/security/advisor… | x_refsource_CONFIRM |
| https://github.com/ruby/net-imap/commit/158d0b505… | x_refsource_MISC |
| https://github.com/ruby/net-imap/commit/808001bc4… | x_refsource_MISC |
| https://github.com/ruby/net-imap/commit/99f59eab6… | x_refsource_MISC |
| https://github.com/ruby/net-imap/releases/tag/v0.4.24 | x_refsource_MISC |
| https://github.com/ruby/net-imap/releases/tag/v0.5.14 | x_refsource_MISC |
| https://github.com/ruby/net-imap/releases/tag/v0.6.4 | x_refsource_MISC |
Impacted products
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CVE-2026-42245 (GCVE-0-2026-42245)
Vulnerability from cvelistv5 – Published: 2026-05-09 19:37 – Updated: 2026-05-12 18:30
VLAI
Title
net-imap: Quadratic complexity when reading response literals
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://github.com/ruby/net-imap/security/advisor… | x_refsource_CONFIRM |
| https://github.com/ruby/net-imap/commit/6091f7d6b… | x_refsource_MISC |
| https://github.com/ruby/net-imap/commit/88d95231f… | x_refsource_MISC |
| https://github.com/ruby/net-imap/commit/de685f91a… | x_refsource_MISC |
| https://github.com/ruby/net-imap/releases/tag/v0.4.24 | x_refsource_MISC |
| https://github.com/ruby/net-imap/releases/tag/v0.5.14 | x_refsource_MISC |
| https://github.com/ruby/net-imap/releases/tag/v0.6.4 | x_refsource_MISC |
Impacted products
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CVE-2026-42246 (GCVE-0-2026-42246)
Vulnerability from cvelistv5 – Published: 2026-05-09 19:33 – Updated: 2026-05-12 02:29
VLAI
Title
net-imap vulnerable to STARTTLS stripping via invalid response timing
Summary
Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to versions 0.3.10, 0.4.24, 0.5.14, and 0.6.4, a man-in-the-middle attacker can cause Net::IMAP#starttls to return "successfully", without starting TLS. This issue has been patched in versions 0.3.10, 0.4.24, 0.5.14, and 0.6.4.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://github.com/ruby/net-imap/security/advisor… | x_refsource_CONFIRM |
| https://github.com/ruby/net-imap/commit/0ede4c40b… | x_refsource_MISC |
| https://github.com/ruby/net-imap/commit/24a4e770b… | x_refsource_MISC |
| https://github.com/ruby/net-imap/commit/97e2488fb… | x_refsource_MISC |
| https://github.com/ruby/net-imap/commit/f79d35bf5… | x_refsource_MISC |
| https://github.com/ruby/net-imap/releases/tag/v0.3.10 | x_refsource_MISC |
| https://github.com/ruby/net-imap/releases/tag/v0.4.24 | x_refsource_MISC |
| https://github.com/ruby/net-imap/releases/tag/v0.5.14 | x_refsource_MISC |
Impacted products
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CVE-2025-43857 (GCVE-0-2025-43857)
Vulnerability from cvelistv5 – Published: 2025-04-28 16:02 – Updated: 2025-04-28 18:00
VLAI
Title
net-imap rubygem vulnerable to possible DoS by memory exhaustion
Summary
Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to versions 0.5.7, 0.4.20, 0.3.9, and 0.2.5, there is a possibility for denial of service by memory exhaustion when net-imap reads server responses. At any time while the client is connected, a malicious server can send can send a "literal" byte count, which is automatically read by the client's receiver thread. The response reader immediately allocates memory for the number of bytes indicated by the server response. This should not be an issue when securely connecting to trusted IMAP servers that are well-behaved. It can affect insecure connections and buggy, untrusted, or compromised servers (for example, connecting to a user supplied hostname). This issue has been patched in versions 0.5.7, 0.4.20, 0.3.9, and 0.2.5.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://github.com/ruby/net-imap/security/advisor… | x_refsource_CONFIRM |
| https://github.com/ruby/net-imap/pull/442 | x_refsource_MISC |
| https://github.com/ruby/net-imap/pull/444/commits… | x_refsource_MISC |
| https://github.com/ruby/net-imap/pull/445 | x_refsource_MISC |
| https://github.com/ruby/net-imap/pull/446 | x_refsource_MISC |
| https://github.com/ruby/net-imap/pull/447 | x_refsource_MISC |
Impacted products
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CVE-2025-25186 (GCVE-0-2025-25186)
Vulnerability from cvelistv5 – Published: 2025-02-10 15:55 – Updated: 2025-02-12 15:46
VLAI
Title
Net::IMAP vulnerable to possible DoS by memory exhaustion
Summary
Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Starting in version 0.3.2 and prior to versions 0.3.8, 0.4.19, and 0.5.6, there is a possibility for denial of service by memory exhaustion in `net-imap`'s response parser. At any time while the client is connected, a malicious server can send can send highly compressed `uid-set` data which is automatically read by the client's receiver thread. The response parser uses `Range#to_a` to convert the `uid-set` data into arrays of integers, with no limitation on the expanded size of the ranges. Versions 0.3.8, 0.4.19, 0.5.6, and higher fix this issue. Additional details for proper configuration of fixed versions and backward compatibility are available in the GitHub Security Advisory.
Severity
6.5 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-400 - Uncontrolled Resource Consumption
- CWE-405 - Asymmetric Resource Consumption (Amplification)
- CWE-409 - Improper Handling of Highly Compressed Data (Data Amplification)
- CWE-770 - Allocation of Resources Without Limits or Throttling
- CWE-789 - Memory Allocation with Excessive Size Value
- CWE-1287 - Improper Validation of Specified Type of Input
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/ruby/net-imap/security/advisor… | x_refsource_CONFIRM |
| https://github.com/ruby/net-imap/commit/70e3ddd07… | x_refsource_MISC |
| https://github.com/ruby/net-imap/commit/c8c5a6437… | x_refsource_MISC |
| https://github.com/ruby/net-imap/commit/cb92191b1… | x_refsource_MISC |
Impacted products
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CVE-2026-42258 (GCVE-0-2026-42258)
Vulnerability from nvd – Published: 2026-05-09 19:40 – Updated: 2026-05-11 14:57
VLAI
Title
net-imap: Command Injection via unvalidated Symbol inputs
Summary
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, symbol arguments to commands are vulnerable to a CRLF Injection / IMAP Command injection via Symbol arguments passed to IMAP commands. This issue has been patched in versions 0.4.24, 0.5.14, and 0.6.4.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/ruby/net-imap/security/advisor… | x_refsource_CONFIRM |
| https://github.com/ruby/net-imap/releases/tag/v0.4.24 | x_refsource_MISC |
| https://github.com/ruby/net-imap/releases/tag/v0.5.14 | x_refsource_MISC |
| https://github.com/ruby/net-imap/releases/tag/v0.6.4 | x_refsource_MISC |
Impacted products
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CVE-2026-42257 (GCVE-0-2026-42257)
Vulnerability from nvd – Published: 2026-05-09 19:39 – Updated: 2026-05-13 19:33
VLAI
Title
net-imap: Command Injection via "raw" arguments to multiple commands
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/ruby/net-imap/security/advisor… | x_refsource_CONFIRM |
| https://github.com/ruby/net-imap/releases/tag/v0.4.24 | x_refsource_MISC |
| https://github.com/ruby/net-imap/releases/tag/v0.5.14 | x_refsource_MISC |
| https://github.com/ruby/net-imap/releases/tag/v0.6.4 | x_refsource_MISC |
Impacted products
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CVE-2026-42256 (GCVE-0-2026-42256)
Vulnerability from nvd – Published: 2026-05-09 19:38 – Updated: 2026-05-11 17:04
VLAI
Title
net-imap: Denial of service via high iteration count for `SCRAM-*` authentication
Summary
Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. From versions 0.4.0 to before 0.4.24, 0.5.0 to before 0.5.14, and 0.6.0 to before 0.6.4, when authenticating a connection with SCRAM-SHA1 or SCRAM-SHA256, a hostile server can perform a computational denial-of-service attack on the client process by sending a big iteration count value. This issue has been patched in versions 0.4.24, 0.5.14, and 0.6.4.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://github.com/ruby/net-imap/security/advisor… | x_refsource_CONFIRM |
| https://github.com/ruby/net-imap/commit/158d0b505… | x_refsource_MISC |
| https://github.com/ruby/net-imap/commit/808001bc4… | x_refsource_MISC |
| https://github.com/ruby/net-imap/commit/99f59eab6… | x_refsource_MISC |
| https://github.com/ruby/net-imap/releases/tag/v0.4.24 | x_refsource_MISC |
| https://github.com/ruby/net-imap/releases/tag/v0.5.14 | x_refsource_MISC |
| https://github.com/ruby/net-imap/releases/tag/v0.6.4 | x_refsource_MISC |
Impacted products
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CVE-2026-42246 (GCVE-0-2026-42246)
Vulnerability from nvd – Published: 2026-05-09 19:33 – Updated: 2026-05-12 02:29
VLAI
Title
net-imap vulnerable to STARTTLS stripping via invalid response timing
Summary
Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to versions 0.3.10, 0.4.24, 0.5.14, and 0.6.4, a man-in-the-middle attacker can cause Net::IMAP#starttls to return "successfully", without starting TLS. This issue has been patched in versions 0.3.10, 0.4.24, 0.5.14, and 0.6.4.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://github.com/ruby/net-imap/security/advisor… | x_refsource_CONFIRM |
| https://github.com/ruby/net-imap/commit/0ede4c40b… | x_refsource_MISC |
| https://github.com/ruby/net-imap/commit/24a4e770b… | x_refsource_MISC |
| https://github.com/ruby/net-imap/commit/97e2488fb… | x_refsource_MISC |
| https://github.com/ruby/net-imap/commit/f79d35bf5… | x_refsource_MISC |
| https://github.com/ruby/net-imap/releases/tag/v0.3.10 | x_refsource_MISC |
| https://github.com/ruby/net-imap/releases/tag/v0.4.24 | x_refsource_MISC |
| https://github.com/ruby/net-imap/releases/tag/v0.5.14 | x_refsource_MISC |
Impacted products
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CVE-2026-42245 (GCVE-0-2026-42245)
Vulnerability from nvd – Published: 2026-05-09 19:37 – Updated: 2026-05-12 18:30
VLAI
Title
net-imap: Quadratic complexity when reading response literals
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://github.com/ruby/net-imap/security/advisor… | x_refsource_CONFIRM |
| https://github.com/ruby/net-imap/commit/6091f7d6b… | x_refsource_MISC |
| https://github.com/ruby/net-imap/commit/88d95231f… | x_refsource_MISC |
| https://github.com/ruby/net-imap/commit/de685f91a… | x_refsource_MISC |
| https://github.com/ruby/net-imap/releases/tag/v0.4.24 | x_refsource_MISC |
| https://github.com/ruby/net-imap/releases/tag/v0.5.14 | x_refsource_MISC |
| https://github.com/ruby/net-imap/releases/tag/v0.6.4 | x_refsource_MISC |
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CVE-2025-43857 (GCVE-0-2025-43857)
Vulnerability from nvd – Published: 2025-04-28 16:02 – Updated: 2025-04-28 18:00
VLAI
Title
net-imap rubygem vulnerable to possible DoS by memory exhaustion
Summary
Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to versions 0.5.7, 0.4.20, 0.3.9, and 0.2.5, there is a possibility for denial of service by memory exhaustion when net-imap reads server responses. At any time while the client is connected, a malicious server can send can send a "literal" byte count, which is automatically read by the client's receiver thread. The response reader immediately allocates memory for the number of bytes indicated by the server response. This should not be an issue when securely connecting to trusted IMAP servers that are well-behaved. It can affect insecure connections and buggy, untrusted, or compromised servers (for example, connecting to a user supplied hostname). This issue has been patched in versions 0.5.7, 0.4.20, 0.3.9, and 0.2.5.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://github.com/ruby/net-imap/security/advisor… | x_refsource_CONFIRM |
| https://github.com/ruby/net-imap/pull/442 | x_refsource_MISC |
| https://github.com/ruby/net-imap/pull/444/commits… | x_refsource_MISC |
| https://github.com/ruby/net-imap/pull/445 | x_refsource_MISC |
| https://github.com/ruby/net-imap/pull/446 | x_refsource_MISC |
| https://github.com/ruby/net-imap/pull/447 | x_refsource_MISC |
Impacted products
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CVE-2025-25186 (GCVE-0-2025-25186)
Vulnerability from nvd – Published: 2025-02-10 15:55 – Updated: 2025-02-12 15:46
VLAI
Title
Net::IMAP vulnerable to possible DoS by memory exhaustion
Summary
Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Starting in version 0.3.2 and prior to versions 0.3.8, 0.4.19, and 0.5.6, there is a possibility for denial of service by memory exhaustion in `net-imap`'s response parser. At any time while the client is connected, a malicious server can send can send highly compressed `uid-set` data which is automatically read by the client's receiver thread. The response parser uses `Range#to_a` to convert the `uid-set` data into arrays of integers, with no limitation on the expanded size of the ranges. Versions 0.3.8, 0.4.19, 0.5.6, and higher fix this issue. Additional details for proper configuration of fixed versions and backward compatibility are available in the GitHub Security Advisory.
Severity
6.5 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-400 - Uncontrolled Resource Consumption
- CWE-405 - Asymmetric Resource Consumption (Amplification)
- CWE-409 - Improper Handling of Highly Compressed Data (Data Amplification)
- CWE-770 - Allocation of Resources Without Limits or Throttling
- CWE-789 - Memory Allocation with Excessive Size Value
- CWE-1287 - Improper Validation of Specified Type of Input
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/ruby/net-imap/security/advisor… | x_refsource_CONFIRM |
| https://github.com/ruby/net-imap/commit/70e3ddd07… | x_refsource_MISC |
| https://github.com/ruby/net-imap/commit/c8c5a6437… | x_refsource_MISC |
| https://github.com/ruby/net-imap/commit/cb92191b1… | x_refsource_MISC |
Impacted products
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