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Vulnerability details: VCID-1zvv-b8mk-fbd1
Vulnerability ID VCID-1zvv-b8mk-fbd1
Aliases CVE-2026-42256
GHSA-87pf-fpwv-p7m7
Summary net-imap vulnerable to denial of service via high iteration count for `SCRAM-*` authentication
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-770 Allocation of Resources Without Limits or Throttling
CWE-1322 Use of Blocking Code in Single-threaded, Non-blocking Context
System Score Found at
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-87pf-fpwv-p7m7
cvssv4 6.0 https://github.com/ruby/net-imap
generic_textual MODERATE https://github.com/ruby/net-imap
cvssv4 6.0 https://github.com/ruby/net-imap/commit/158d0b505074397cdb5ceb58935e42dd2bcfa612
generic_textual MODERATE https://github.com/ruby/net-imap/commit/158d0b505074397cdb5ceb58935e42dd2bcfa612
cvssv4 6.0 https://github.com/ruby/net-imap/commit/808001bc45c06f7297a7e96d341279e041a7f7f4
generic_textual MODERATE https://github.com/ruby/net-imap/commit/808001bc45c06f7297a7e96d341279e041a7f7f4
cvssv4 6.0 https://github.com/ruby/net-imap/commit/99f59eab6064955a23debd95410263ad144df758
generic_textual MODERATE https://github.com/ruby/net-imap/commit/99f59eab6064955a23debd95410263ad144df758
cvssv4 6.0 https://github.com/ruby/net-imap/releases/tag/v0.4.24
generic_textual MODERATE https://github.com/ruby/net-imap/releases/tag/v0.4.24
cvssv4 6.0 https://github.com/ruby/net-imap/releases/tag/v0.5.14
generic_textual MODERATE https://github.com/ruby/net-imap/releases/tag/v0.5.14
cvssv4 6.0 https://github.com/ruby/net-imap/releases/tag/v0.6.4
generic_textual MODERATE https://github.com/ruby/net-imap/releases/tag/v0.6.4
cvssv3.1_qr MODERATE https://github.com/ruby/net-imap/security/advisories/GHSA-87pf-fpwv-p7m7
cvssv4 6.0 https://github.com/ruby/net-imap/security/advisories/GHSA-87pf-fpwv-p7m7
generic_textual MODERATE https://github.com/ruby/net-imap/security/advisories/GHSA-87pf-fpwv-p7m7
cvssv4 6.0 https://www.rfc-editor.org/rfc/rfc7804.html#page-15
generic_textual MODERATE https://www.rfc-editor.org/rfc/rfc7804.html#page-15
Reference id Reference type URL
https://github.com/ruby/net-imap
https://github.com/ruby/net-imap/commit/158d0b505074397cdb5ceb58935e42dd2bcfa612
https://github.com/ruby/net-imap/commit/808001bc45c06f7297a7e96d341279e041a7f7f4
https://github.com/ruby/net-imap/commit/99f59eab6064955a23debd95410263ad144df758
https://github.com/ruby/net-imap/releases/tag/v0.4.24
https://github.com/ruby/net-imap/releases/tag/v0.5.14
https://github.com/ruby/net-imap/releases/tag/v0.6.4
https://www.rfc-editor.org/rfc/rfc7804.html#page-15
GHSA-87pf-fpwv-p7m7 https://github.com/advisories/GHSA-87pf-fpwv-p7m7
GHSA-87pf-fpwv-p7m7 https://github.com/ruby/net-imap/security/advisories/GHSA-87pf-fpwv-p7m7
No exploits are available.
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N Found at https://github.com/ruby/net-imap
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

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Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N Found at https://github.com/ruby/net-imap/commit/158d0b505074397cdb5ceb58935e42dd2bcfa612
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

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Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N Found at https://github.com/ruby/net-imap/commit/808001bc45c06f7297a7e96d341279e041a7f7f4
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

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Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N Found at https://github.com/ruby/net-imap/commit/99f59eab6064955a23debd95410263ad144df758
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

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Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N Found at https://github.com/ruby/net-imap/releases/tag/v0.4.24
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

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Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N Found at https://github.com/ruby/net-imap/releases/tag/v0.5.14
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

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Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N Found at https://github.com/ruby/net-imap/releases/tag/v0.6.4
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

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Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N Found at https://github.com/ruby/net-imap/security/advisories/GHSA-87pf-fpwv-p7m7
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

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Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N Found at https://www.rfc-editor.org/rfc/rfc7804.html#page-15
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

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No EPSS data available for this vulnerability.

Date Actor Action Source VulnerableCode Version
2026-05-06T11:59:20.694740+00:00 GHSA Importer Import https://github.com/advisories/GHSA-87pf-fpwv-p7m7 38.6.0