CVE-2026-42393

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-42393
StatePUBLISHED
AssignerOX
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-28 12:16:29 UTC
Updated2026-09-03 18:13:44 UTC
DescriptionThe comparison used for the doveadm password and API key is not fully timing safe and can reveal the length of the configured secret. An attacker with access to the same network as the doveadm service, able to make repeated requests and measure response timing accurately, can learn the length of the secret, which reduces the effort needed to guess it. The secret value itself is not disclosed. Restrict network access to the doveadm service to trusted clients. Update to non-vulnerable version. No publicly available exploits are known.

Risk And Classification

Primary CVSS: v3.1 3.1 LOW from [email protected]

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS: 0.001450000 probability, percentile 0.040320000 (date 2026-09-07)

Problem Types: CWE-200 | CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary3.1LOWCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
3.1CNACVSS3.1LOWCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Adjacent
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Open-Xchange GmbH OX Dovecot Pro affected 2.3.0 2.3.22.2 semver Not specified
CNA Open-Xchange GmbH OX Dovecot Pro affected 3.0.0 3.0.7 semver Not specified
CNA Open-Xchange GmbH OX Dovecot Pro affected 3.1.0 3.1.6 semver Not specified
CNA Open-Xchange GmbH OX Dovecot CE affected 2.3.0 2.4.5 semver Not specified

References

ReferenceSourceLinkTags
documentation.open-xchange.com/dovecot/security/advisories/csaf/2026/oxdc-adv-2026-0003.json [email protected] documentation.open-xchange.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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