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OESA-2026-2578 (CVE-2026-42245)
Vulnerability from osv_openeuler – Published: 2026-06-05 11:11 – Updated: 2026-08-06 11:11 – Source website
VLAI
Summary
ruby security update
Details
Ruby is a fast and easy interpreted scripting language for object-oriented programming. It has many functions for processing text Files and perform system management tasks (such as Perl).
Security Fix(es):
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.(CVE-2026-42245)
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.(CVE-2026-42246)
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.(CVE-2026-42257)
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.(CVE-2026-42258)
Severity
9.8 (Critical)
References
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"database_specific": {
"severity": "Critical"
},
"details": "Ruby is a fast and easy interpreted scripting language for object-oriented programming. It has many functions for processing text Files and perform system management tasks (such as Perl).\r\n\r\nSecurity Fix(es):\n\nNet::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\u0026apos;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.(CVE-2026-42245)\n\nNet::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 \u0026quot;successfully\u0026quot;, without starting TLS. This issue has been patched in versions 0.3.10, 0.4.24, 0.5.14, and 0.6.4.(CVE-2026-42246)\n\nNet::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.(CVE-2026-42257)\n\nNet::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.(CVE-2026-42258)",
"id": "OESA-2026-2578",
"modified": "2026-08-06T11:11:31Z",
"published": "2026-06-05T11:11:31Z",
"references": [
{
"type": "ADVISORY",
"url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2578"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42245"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42246"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42257"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42258"
}
],
"schema_version": "1.7.2",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
],
"summary": "ruby security update",
"upstream": [
"CVE-2026-42245",
"CVE-2026-42246",
"CVE-2026-42257",
"CVE-2026-42258"
]
}
CVE-2026-42245 (GCVE-0-2026-42245)
Vulnerability from cvelistv5 – Published: 2026-05-09 19:37 – Updated: 2026-05-12 18:30
VLAI
EPSS
VEX
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 · CISA-ADP (v2.0.3)
Decision recorded 2026-05-12 17:53 UTC
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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"metrics": [
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"id": "CVE-2026-42245",
"options": [
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}
],
"metrics": [
{
"cvssV4_0": {
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"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"baseScore": 2.3,
"baseSeverity": "LOW",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "PASSIVE",
"vectorString": "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",
"version": "4.0",
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{
"name": "https://github.com/ruby/net-imap/commit/88d95231fc8afef11c1f074453f7d75b68c9dfda",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/ruby/net-imap/commit/88d95231fc8afef11c1f074453f7d75b68c9dfda"
},
{
"name": "https://github.com/ruby/net-imap/commit/de685f91a4a4cc75eb80da898c2bf8af08d34819",
"tags": [
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],
"url": "https://github.com/ruby/net-imap/commit/de685f91a4a4cc75eb80da898c2bf8af08d34819"
},
{
"name": "https://github.com/ruby/net-imap/releases/tag/v0.4.24",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/ruby/net-imap/releases/tag/v0.4.24"
},
{
"name": "https://github.com/ruby/net-imap/releases/tag/v0.5.14",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/ruby/net-imap/releases/tag/v0.5.14"
},
{
"name": "https://github.com/ruby/net-imap/releases/tag/v0.6.4",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/ruby/net-imap/releases/tag/v0.6.4"
}
],
"source": {
"advisory": "GHSA-q2mw-fvj9-vvcw",
"discovery": "UNKNOWN"
},
"title": "net-imap: Quadratic complexity when reading response literals"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-42245",
"datePublished": "2026-05-09T19:37:08.905Z",
"dateReserved": "2026-04-25T05:37:12.118Z",
"dateUpdated": "2026-05-12T18:30:58.415Z",
"state": "PUBLISHED"
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CVE-2026-42246 (GCVE-0-2026-42246)
Vulnerability from cvelistv5 – Published: 2026-05-09 19:33 – Updated: 2026-08-24 12:06
VLAI
EPSS
VEX
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 · CISA-ADP (v2.0.3)
Decision recorded 2026-05-12 02:29 UTC
CWE
Assigner
References
31 references
Impacted products
27 products
| Vendor | Product | Version | |
|---|---|---|---|
| ruby | net-imap |
Affected:
< 0.3.10
Affected: >= 0.4.0, < 0.4.24 Affected: >= 0.5.0, < 0.5.14 Affected: >= 0.6.0, < 0.6.4 |
|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
0:4.0.3-35.el10_2 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
0:3.3.10-13.el10_2 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support |
Unaffected:
0:3.3.10-11.el10_0.2 , < *
(rpm)
cpe:/o:redhat:enterprise_linux_eus:10.0 |
|
| Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support |
Unaffected:
0:2.0.0.648-39.el7_9.1 , < *
(rpm)
cpe:/o:redhat:rhel_els:7 |
|
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
8100020260615131019.489197e6 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8 |
|
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
8100020260615131010.489197e6 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8 |
|
| Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support |
Unaffected:
8040020260630124058.522a0ee4 , < *
(rpm)
cpe:/a:redhat:rhel_aus:8.4 |
|
| Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On |
Unaffected:
8040020260630124058.522a0ee4 , < *
(rpm)
cpe:/a:redhat:rhel_eus_long_life:8.4 |
|
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support |
Unaffected:
8060020260630123825.ad008a3a , < *
(rpm)
cpe:/a:redhat:rhel_aus:8.6 |
|
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On |
Unaffected:
8060020260630123825.ad008a3a , < *
(rpm)
cpe:/a:redhat:rhel_eus_long_life:8.6 |
|
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service |
Unaffected:
8080020260625114827.63b34585 , < *
(rpm)
cpe:/a:redhat:rhel_tus:8.8 |
|
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions |
Unaffected:
8080020260625114827.63b34585 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:8.8 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
0:3.0.7-167.el9_8 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
9080020260615131001.9 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
9080020260619130154.9 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9 |
|
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions |
Unaffected:
0:3.0.4-161.el9_2.3 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:9.2 |
|
| Red Hat | Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions |
Unaffected:
0:3.0.7-162.el9_4.3 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:9.4 |
|
| Red Hat | Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions |
Unaffected:
9040020260630065449.9 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:9.4 |
|
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support |
Unaffected:
0:3.0.7-165.el9_6.1 , < *
(rpm)
cpe:/a:redhat:rhel_eus:9.6 |
|
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support |
Unaffected:
9060020260630075016.9 , < *
(rpm)
cpe:/a:redhat:rhel_eus:9.6 |
|
| Red Hat | Red Hat Hardened Images |
Unaffected:
4.0.0-33.4.hum1 , < *
(rpm)
cpe:/a:redhat:hummingbird:1 |
|
| Red Hat | Red Hat Hardened Images |
Unaffected:
3.4.10-31.hum1 , < *
(rpm)
Unaffected: 3.4.8-31.2.hum1 , < * (rpm) cpe:/a:redhat:hummingbird:1 |
|
| Red Hat | Red Hat Hardened Images |
Unaffected:
3.3.10-23.2.hum1 , < *
(rpm)
cpe:/a:redhat:hummingbird:1 |
|
| Red Hat | Red Hat 3scale API Management Platform 2 |
cpe:/a:redhat:red_hat_3scale_amp:2
|
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat OpenShift Container Platform 4 |
cpe:/a:redhat:openshift:4
|
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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
EPSS
VEX
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 · CISA-ADP (v2.0.3)
Decision recorded 2026-05-13 19:27 UTC
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-2026-42258 (GCVE-0-2026-42258)
Vulnerability from cvelistv5 – Published: 2026-05-09 19:40 – Updated: 2026-09-01 12:04
VLAI
EPSS
VEX
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 · CISA-ADP (v2.0.3)
Decision recorded 2026-05-11 14:57 UTC
CWE
Assigner
References
27 references
Impacted products
29 products
| Vendor | Product | Version | |
|---|---|---|---|
| ruby | net-imap |
Affected:
< 0.4.24
Affected: >= 0.5.0, < 0.5.14 Affected: >= 0.6.0, < 0.6.4 |
|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
0:4.0.3-35.el10_2 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
0:3.3.10-13.el10_2 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support |
Unaffected:
0:3.3.10-11.el10_0.2 , < *
(rpm)
cpe:/o:redhat:enterprise_linux_eus:10.0 |
|
| Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support |
Unaffected:
0:2.0.0.648-39.el7_9.1 , < *
(rpm)
cpe:/o:redhat:rhel_els:7 |
|
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
8100020260615131019.489197e6 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8 |
|
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
8100020260615131010.489197e6 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8 |
|
| Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support |
Unaffected:
8040020260630124058.522a0ee4 , < *
(rpm)
cpe:/a:redhat:rhel_aus:8.4 |
|
| Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On |
Unaffected:
8040020260630124058.522a0ee4 , < *
(rpm)
cpe:/a:redhat:rhel_eus_long_life:8.4 |
|
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support |
Unaffected:
8060020260630123825.ad008a3a , < *
(rpm)
cpe:/a:redhat:rhel_aus:8.6 |
|
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On |
Unaffected:
8060020260630123825.ad008a3a , < *
(rpm)
cpe:/a:redhat:rhel_eus_long_life:8.6 |
|
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service |
Unaffected:
8080020260625114827.63b34585 , < *
(rpm)
cpe:/a:redhat:rhel_tus:8.8 |
|
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions |
Unaffected:
8080020260625114827.63b34585 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:8.8 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
0:3.0.7-167.el9_8 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
9080020260615131001.9 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
9080020260619130154.9 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9 |
|
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions |
Unaffected:
0:3.0.4-161.el9_2.3 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:9.2 |
|
| Red Hat | Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions |
Unaffected:
0:3.0.7-162.el9_4.3 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:9.4 |
|
| Red Hat | Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions |
Unaffected:
9040020260630065449.9 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:9.4 |
|
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support |
Unaffected:
0:3.0.7-165.el9_6.1 , < *
(rpm)
cpe:/a:redhat:rhel_eus:9.6 |
|
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support |
Unaffected:
9060020260630075016.9 , < *
(rpm)
cpe:/a:redhat:rhel_eus:9.6 |
|
| Red Hat | Red Hat Hardened Images |
Unaffected:
4.0.5-35.hum1 , < *
(rpm)
cpe:/a:redhat:hummingbird:1 |
|
| Red Hat | Red Hat Hardened Images |
Unaffected:
3.4.10-31.hum1 , < *
(rpm)
cpe:/a:redhat:hummingbird:1 |
|
| Red Hat | Red Hat Hardened Images |
Unaffected:
3.3.10-23.4.hum1 , < *
(rpm)
cpe:/a:redhat:hummingbird:1 |
|
| Red Hat | Red Hat 3scale API Management Platform 2 |
cpe:/a:redhat:red_hat_3scale_amp:2
|
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat OpenShift AI (RHOAI) |
cpe:/a:redhat:openshift_ai
|
|
| Red Hat | Red Hat OpenShift Container Platform 4 |
cpe:/a:redhat:openshift:4
|
|
| Red Hat | Red Hat OpenShift Dev Spaces |
cpe:/a:redhat:openshift_devspaces:3
|
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},
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"value": "RHSA-2026:37397: Red Hat Enterprise Linux Server (v. 7 ELS), Red Hat Enterprise Linux Server Optional (v. 7 ELS)"
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{
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"value": "RHSA-2026:35895: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)"
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"value": "RHSA-2026:33565: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)"
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"value": "RHSA-2026:35867: Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)"
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{
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"value": "RHSA-2026:34076: Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream TUS (v.8.8)"
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},
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"value": "RHSA-2026:33577: Red Hat Enterprise Linux AppStream (v. 9)"
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{
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"timeline": [
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"lang": "en",
"time": "2026-05-09T20:01:01.698Z",
"value": "Reported to Red Hat."
},
{
"lang": "en",
"time": "2026-05-09T19:40:49.405Z",
"value": "Made public."
}
],
"title": "ruby/net-imap: ruby: Net::IMAP: IMAP Command Injection via Symbol Arguments",
"workarounds": [
{
"lang": "en",
"value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."
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],
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"versions": [
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{
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{
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}
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}
],
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{
"cvssV4_0": {
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"attackRequirements": "PRESENT",
"attackVector": "LOCAL",
"baseScore": 5.8,
"baseSeverity": "MEDIUM",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
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"vulnAvailabilityImpact": "LOW",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "HIGH"
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],
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},
{
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{
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"providerMetadata": {
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{
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],
"source": {
"advisory": "GHSA-75xq-5h9v-w6px",
"discovery": "UNKNOWN"
},
"title": "net-imap: Command Injection via unvalidated Symbol inputs"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-42258",
"datePublished": "2026-05-09T19:40:49.405Z",
"dateReserved": "2026-04-26T11:53:27.704Z",
"dateUpdated": "2026-09-01T12:04:48.054Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
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}
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Trend slope:
-
(linear fit over daily sighting counts)
Show additional events:
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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