CVE Explorer

CVE-2026-27859

A mail message containing excessive amount of RFC 2231 MIME parameters causes LMTP to use too much CPU. A suitably formatted mail message causes mail delivery process to consume large amounts of CPU time. Use MTA capabilities to limit RFC 2231 MIME parameters in mail messages, or upgrade to fixed version where the processing is limited. No publicly available exploits are known.

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:abce807f18cc4129d181892e43a6703d2cba6bad1d7bbce64511b26db070d1db

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"defaultStatus":"unaffected","modules":["core"],"product":"OX Dovecot Pro","vendor":"Open-Xchange GmbH","versions":[{"lessThanOrEqual":"3.0.2","status":"affected","version":"0","versionType":"semver"},{"lessThanOrEqual":"3.1.0","status":"affected","version":"0","versionType":"semver"},{"lessThanOrEqual":"2.4.0","status":"affected","version":"0","versionType":"semver"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:d8d89c68f53f337a472c5d6eca64f54057eb68ecd60c66c943765f8efe9d2e69 · sha256:bfd275ceffb3c0fe… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:d8d89c68f53f337a472c5d6eca64f54057eb68ecd60c66c943765f8efe9d2e69 · sha256:bfd275ceffb3c0fe… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion

{"cweId":"CWE-400","description":"Uncontrolled Resource Consumption","lang":"en","type":"cwe"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:d8d89c68f53f337a472c5d6eca64f54057eb68ecd60c66c943765f8efe9d2e69 · sha256:bfd275ceffb3c0fe… · /containers/cna/problemTypes/0/descriptions/0

Source references

1 source assertion

{"tags":["vendor-advisory"],"url":"https://documentation.open-xchange.com/dovecot/security/advisories/csaf/2026/oxdc-adv-2026-0001.json"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:d8d89c68f53f337a472c5d6eca64f54057eb68ecd60c66c943765f8efe9d2e69 · sha256:bfd275ceffb3c0fe… · /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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