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CVE-2026-42256

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.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:77ca7dbbd1511134d97bef59bb27727da2369f1e54f130d0d67b820ae43d42fb
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-1322","description":"CWE-1322: Use of Blocking Code in Single-threaded, Non-blocking Context","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:5d0cefffa78355b6a9c88d189c7350fa76be31a53e88d948d3e6b8909950beb9 · sha256:f05d5b19c89bb1c6… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-770","description":"CWE-770: Allocation of Resources Without Limits or Throttling","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:5d0cefffa78355b6a9c88d189c7350fa76be31a53e88d948d3e6b8909950beb9 · sha256:f05d5b19c89bb1c6… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion
{"product":"net-imap","vendor":"ruby","versions":[{"status":"affected","version":">= 0.4.0, < 0.4.24"},{"status":"affected","version":">= 0.5.0, < 0.5.14"},{"status":"affected","version":">= 0.6.0, < 0.6.4"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:5d0cefffa78355b6a9c88d189c7350fa76be31a53e88d948d3e6b8909950beb9 · sha256:f05d5b19c89bb1c6… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":6,"baseSeverity":"MEDIUM","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:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:5d0cefffa78355b6a9c88d189c7350fa76be31a53e88d948d3e6b8909950beb9 · sha256:f05d5b19c89bb1c6… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

2 source assertions
{"cweId":"CWE-1322","description":"CWE-1322: Use of Blocking Code in Single-threaded, Non-blocking Context","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:5d0cefffa78355b6a9c88d189c7350fa76be31a53e88d948d3e6b8909950beb9 · sha256:f05d5b19c89bb1c6… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-770","description":"CWE-770: Allocation of Resources Without Limits or Throttling","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:5d0cefffa78355b6a9c88d189c7350fa76be31a53e88d948d3e6b8909950beb9 · sha256:f05d5b19c89bb1c6… · /containers/cna/problemTypes/1/descriptions/0

Source references

7 source assertions
{"name":"https://github.com/ruby/net-imap/commit/158d0b505074397cdb5ceb58935e42dd2bcfa612","tags":["x_refsource_MISC"],"url":"https://github.com/ruby/net-imap/commit/158d0b505074397cdb5ceb58935e42dd2bcfa612"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5d0cefffa78355b6a9c88d189c7350fa76be31a53e88d948d3e6b8909950beb9 · sha256:f05d5b19c89bb1c6… · /containers/cna/references/1
{"name":"https://github.com/ruby/net-imap/commit/808001bc45c06f7297a7e96d341279e041a7f7f4","tags":["x_refsource_MISC"],"url":"https://github.com/ruby/net-imap/commit/808001bc45c06f7297a7e96d341279e041a7f7f4"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5d0cefffa78355b6a9c88d189c7350fa76be31a53e88d948d3e6b8909950beb9 · sha256:f05d5b19c89bb1c6… · /containers/cna/references/2
{"name":"https://github.com/ruby/net-imap/commit/99f59eab6064955a23debd95410263ad144df758","tags":["x_refsource_MISC"],"url":"https://github.com/ruby/net-imap/commit/99f59eab6064955a23debd95410263ad144df758"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5d0cefffa78355b6a9c88d189c7350fa76be31a53e88d948d3e6b8909950beb9 · sha256:f05d5b19c89bb1c6… · /containers/cna/references/3
{"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"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5d0cefffa78355b6a9c88d189c7350fa76be31a53e88d948d3e6b8909950beb9 · sha256:f05d5b19c89bb1c6… · /containers/cna/references/4
{"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"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5d0cefffa78355b6a9c88d189c7350fa76be31a53e88d948d3e6b8909950beb9 · sha256:f05d5b19c89bb1c6… · /containers/cna/references/5
{"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"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5d0cefffa78355b6a9c88d189c7350fa76be31a53e88d948d3e6b8909950beb9 · sha256:f05d5b19c89bb1c6… · /containers/cna/references/6
{"name":"https://github.com/ruby/net-imap/security/advisories/GHSA-87pf-fpwv-p7m7","tags":["x_refsource_CONFIRM"],"url":"https://github.com/ruby/net-imap/security/advisories/GHSA-87pf-fpwv-p7m7"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5d0cefffa78355b6a9c88d189c7350fa76be31a53e88d948d3e6b8909950beb9 · sha256:f05d5b19c89bb1c6… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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