CVE WatchAug 28, 2026

CVE-2026-42393

The comparison used for the doveadm password and API key is not fully timing safe and can reveal the length of the configured secret. An att

CVSS

3.1

Low

EPSS

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KEV

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Exploit Today

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0-100

Published: Aug 28, 2026 · Last modified: Aug 28, 2026 · CWE-200

EPSS · 30d

Not enough EPSS history yet.

Technical description

The 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.

Official references

documentation.open-xchange.comhttps://documentation.open-xchange.com/dovecot/security/advisories/csaf/2026/oxdc-adv-2026-0003.json

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